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eta_calibres

ETA calibres

ETA is the largest manufacturer of watch movements in Switzerland. The company has taken on most of the Swiss movement industry over the last century, including hundreds of movements.

This page contains information on the main series of calibres from ETA.

Eterna calibres

Before the emergence of the Swatch Group, ETA was the movement supplier for Eterna inside ASUAG/Ebauches SA. It is here that many common technologies were developed, including the predecessors for the modern ETA 2824/2836 and ETA 2892 movements.

Mainstream Watch Calibres

  • First Eterna mens calibre (1940's)
    • Eterna 520 - 12 ligne, sub or sweep seconds
  • Long power reserve (52 hours), 1950's
    • Eterna 1274 - 10.5 ligne, manual wind
    • Eterna 1275 - 11.5 ligne, manual wind
  • First sweep seconds (predecessor to Eterna 1158, 1940's)
    • Eterna 1078 - 10.5 ligne, manual wind
    • Eterna 1079 - 11.5 ligne, manual wind
    • Eterna 833, 835 - 11.75 ligne
    • Eterna 834 - 12.25 ligne
    • Eterna 1076, 1077 - 13 ligne
  • Second-generation bumper automatic
  • First-generation central-rotor automatic
    • Eterna 1248 - (1949) 11.5 ligne
    • Eterna 1247, 1237 - (1949-1954) 12.5 ligne
    • Eterna 1254, 1246 - (1949-1954) 13.5 ligne
    • Eterna 1249, 1239, 1253, 1243 - (1949-1954) 13 ligne
  • Indirect-drive minutes, manual winding (1950's)
    • Eterna 1406 - 10.5 ligne
    • Eterna 1407 - 11.5 ligne
    • Eterna 1436 - 10.5 ligne
  • Indirect-drive minutes, manual winding (1960's)
    • Eterna 1408, 1448 - 11.5 ligne
    • Eterna 1409, 1449 - 12.5 ligne
    • Eterna 1410, 1450 - 13 ligne
  • Second-generation central-rotor automatic
    • Eterna 1411, 1421 - 11.5 ligne
    • Eterna 1412, 1422, 1413, 1423 - 12.5 ligne
    • Eterna 1414, 1424, 1415, 1425 - 13 ligne
    • Eterna 1416, 1426 - 13.5 ligne
  • Third-generation central-rotor automatic
    • Eterna 1427, 1431 - (1955-) 11.5 ligne
    • Eterna 1428, 1432, 1438, 1453 - (1955-) 12.5 ligne
    • Eterna 1429, 1433, 1439 - (1955-) 13 ligne
  • Fourth-generation central-rotor automatic
    • Eterna 1470, 1480 - 12.5 ligne
    • Eterna 1471, 1481 - 13 ligne
  • Fifth-generation central-rotor automatic and manual wind (1960's)
    • Eterna 1475, 1485 - 12.5 ligne
    • Eterna 1476, 1486 - 13 ligne
    • Eterna 1478, 1488 - 12.5 ligne, automatic
    • Eterna 1479, 1489 - 13 ligne, automatic

Large Calibres

  • Stem wind and pin set (1890's-1910's)
    • Eterna 35L - 18 ligne
    • Eterna 51 - 20 ligne, alarm
  • Stem wind and set (1920's)
    • Eterna 403, 467 - 18 ligne
    • Eterna 165 - 19 ligne
  • 14 ligne, hand winding (1940's)
    • Eterna/ETA 852, 853, 854, 858, 859 - sub seconds or sweep seconds (“S”)
    • Eterna/ETA 857 - sweep seconds
  • New thin central-rotor automatic, predecessor to ETA's Cal. 2892 series
    • Eterna 1455U, 1465U - (1962-) 12.5 ligne, 18,000 A/h
    • Eterna 1456U, 1457U, 1466U - (1962-) 13 ligne, 18,000 A/h
    • Eterna 1500K, 1500KB, 1501K - (1963-1973) 13 ligne, 21,600 A/h
    • Eterna 1504K, 1504KB - (1973-1975) 13 ligne, 28,800 A/h

Small Calibres

  • Tonneau, 4.5 x 10.25 ligne (1930's)
    • Eterna/ETA 651, 652, 653, 654, 655, 658
  • Tonneau, 8 x 9 ligne (1930's)
    • Eterna/ETA 860
  • Tonneau, 5.75 x 8.5 ligne
    • Early 1930's
      • Eterna/ETA 370
      • Eterna/ETA 371
      • Eterna/ETA 372
    • Late 1930's
      • Eterna/ETA 615
      • Eterna/ETA 616
    • 1940's
      • Eterna/ETA 761, 762, 763, 764, 773, 838, 839, 840, 841, 846, 862, 882, 1030, 1040 - no seconds
      • Eterna/ETA 879 - sweep seconds
      • Eterna/ETA 1057
    • 1950's
      • Eterna/ETA 1201, 1202, 1203, 1204, 1205, 1206, 1207, 1208, 1209, 1210, 1212, 1214, 1215 - no seconds
      • Eterna/ETA 1211 - sweep seconds
  • Tonneau, 5.75 x 6.75 ligne
    • 1950's
      • Eterna 880
      • Eterna 1437, 1447 (ETA 2480, 2482, 2485, 2487)
  • Early hand-winding (1930's)
    • Eterna 600 - 10.5 ligne
  • Hand-winding (1940's)
    • Eterna 845, 905 - 9.75 ligne
  • First bumper automatic for ladies (1941-1948)
    • Eterna 1031 - 7.75 ligne, manual winding
    • Eterna 1033 - 9.75 ligne, automatic (bumper)
    • Eterna 1034 - 9.75 automatic (bumper), sweep seconds
  • First full-rotor automatic for ladies (1948-)
    • ETA 1170, 1171, 1172, 1173 - 7.75 ligne hand winding
    • Eterna 1194 - 7.75 ligne
    • Eterna 1195 - 8.25 ligne (ETA 1218)
    • Eterna 1198 - 9.25 ligne (ETA 1216)
    • Eterna 1199 - 10 ligne (ETA 1217)
    • Eterna 1200 - 7.75 ligne, manual winding
  • Early full rotor ladies automatic, early 1950's
    • ETA 1301, 1301, 1303, 1304, 1311, 1312 - 8.75 ligne hand winding
    • Eterna/ETA 1306, 1316 - 9.75 ligne automatic
    • Eterna/ETA 1307, 1317 - 10.5 ligne automatic
    • Eterna/ETA 1308, 1318, 1322 - 8.75 ligne automatic
    • Eterna/ETA 1309, 1315, 1310, 1320 - 9.25 ligne automatic
    • Eterna 1319 - 9.25 ligne
    • Eterna 1321 - 10.5 ligne
    • Eterna 1323 - 9.25 ligne
    • Eterna 1324 - 10.5 ligne
  • Automatic (1950's)
    • Eterna 1401 - 7.25 ligne, automatic
    • Eterna 1402 - 7.75 ligne, automatic
    • Eterna 1403 - 8.35 ligne, automatic
    • Eterna 1405 - 7.75 ligne, manual winding
    • Eterna 1441 - 7.75 ligne, automatic, date
    • Eterna 1444 - 8.25 ligne, automatic, date
  • Indirect-drive minutes (1960's)
    • Eterna 1417 - 6 ligne, manual winding
    • Eterna 1418 - 6.75 ligne, manual winding
    • Eterna 1419 - 6.75 ligne, automatic (ETA 2425, 2428)
    • Eterna 1420 - 7.25 ligne, automatic
    • Eterna 1435 - 7.75 ligne, manual wind
    • Eterna 1445 - 7.75 ligne, automatic
    • Eterna 1446 - 8.25 ligne, automatic
  • Full-rotor automatic ladies (1960s)
    • Eterna 1458 - manual wind
    • Eterna 1459 - 7.75 ligne
    • Eterna 1458 - manual wind, date
    • Eterna 1469 - 7.75 ligne, date
  • Automatic with sweep (1960's)
    • Eterna 1463, 1497 - 6.75 ligne

ETA-ESA Tuning Fork Movements

  • 1960's
    • ETA-ESA 9162, 9164 (Eterna 1550, 1551; Certina 29-151, 29-152; Longines 6312, 6332; Omega 1250, 1255, 1260; Tissot 2010, 2020; Zenith 50.0, 50.5)

ETA-ESA Electronic Movements

ETA-ESA Quartz Movements

2000 Series

ETA's modern ETA 2000 movement is a small-size evolution of their automatic ladies movements.

2410 Series

ETA evolved Eterna's compact 6.75 ligne (ladies) calibre Eterna 1419 into a series of compact automatics for other manufacturers in the 1950's and 1960's. These are the first ETA movements to beat at 21,600 A/h.

  • 18,000 A/h
    • ETA 2410, 2415 - manual winding
    • ETA 2425 - automatic
  • 21,600 A/h
    • ETA 2412, 2413, 2417 - manual winding
    • ETA 2428 - automatic

2450 Series

ETA produced this line of compact and popular movements in the 1950's and 1960's, including their successful automatic line. All are 10.5 or 11.5 lignes in diameter and operate at 18,000 A/h.

2500/2600/2722/2732 Series

ETA's mainstream movement line from the 1960's is mostly forgotten today, though it serves as a basis for the modern, well-known ETA 2824 and ETA 2836 movements. Like that family, this group includes 11.5 and 13 ligne movements with both manual and automatic winding. This series was one of the first high-beat movements from ETA, ranging from the basic 18,000 A/h all the way up to 36,000 A/h for the ETA 2732.

Winding Size (ligne) Speed (bph) No Date Date Only Day/Date
Manual 11.5 18,000 ETA 2500 ETA 2502 ETA 2508
ETA 2516 q
21,600 ETA 2600 ETA 2602 ETA 2608
ETA 2612 q ETA 2618 q
13 18,000 ETA 2503 ETA 2509
21,600 ETA 2603 ETA 2609
Automatic 11.5 18,000 ETA 2520 ETA 2522 ETA 2538 q
ETA 2524 ETA 2522
ETA 2525 ETA 2526
ETA 2528 ETA 2527
ETA 2529
ETA 2532 q
21,600 ETA 2620 ETA 2622 ETA 2630 q
ETA 2637 q ETA 2630 q
ETA 2632 q
ETA 2638 q
28,800 ETA 2722 ETA 2724 q ETA 2728 q
36,000 ETA 2732 ETA 2734 q ETA 2738 q
13 18,000 ETA 2521 ETA 2523 ETA 2539 q
21,600 ETA 2623 ETA 2639 q

2640 Series

This compact movement family is primarily used in ladies watches. It was introduced in 1971 and continues in production today. Movements operate at 21,600 or 28,800 A/h and measure 7.75 ligne in diameter. The 2640 series was derived from earlier Eterna calibres and was also sold by Eterna with an additional “1” preceding the number (e.g., 12660 = 2660).

(Current movements in bold)

WindingSize (ligne)Speed (bph)No DateDate OnlyMoon PhaseDay/Date
Manual7.7521,600ETA 2640ETA 2641ETA 2648
28,800ETA 2660ETA 2661ETA 2668
8.7521,600ETA 2691
Automatic7.7521,600ETA 2650ETA 2651ETA 2658
28,800ETA 2670ETA 2671ETA 2675ETA 2678
8.7521,600ETA 2688
28,800ETA 2681ETA 2685

2750/2760/2770/2780/2790 Series

The 2750/2770 family of movements was a mainstream product for ETA through the 1970's, with production beginning around 1969 and lasting until 1982. Over 6 million hand-winding and 25 million automatics from this family were made, and they are the predecessor of the modern ETA 2824 family.

WindingSpeed (bph)No DateDate OnlyDay/Date
Manual21,600ETA 2750ETA 2752
ETA 2753 T
ETA 2761 qh
ETA 2762 q
ETA 2763 q
ETA 2758 h
ETA 2759 Th
ETA 2768 qh
ETA 2769 qqh
Manual28,800ETA 2751ETA 2754
ETA 2764 q
ETA 2760 h
Automatic21,600ETA 2770
ETA 2776
ETA 2772
ETA 2773 T
ETA 2781 qh
ETA 2782 q
ETA 2783 q
ETA 2778 h
ETA 2779 Th
ETA 2788 qh
ETA 2789 qqh
Automatic28,800ETA 2771ETA 2774
ETA 2784 q
ETA 2791 qh
ETA 2780 h
ETA 2790 qqh

2800 Series

This movement family is derived from the ETA 2750 and ETA 2770, which were themselves evolved from the ETA 2600 and ETA 2620 and originally the ETA 2370 and ETA 2375. Today, the most common members of this family are the ETA 2824 and ETA 2836. Note that the ETA 2892 family is technically unrelated to this, having been derived from an entirely different series of Eterna movements.

The 2800 series movements are extremely similar. Across all of the variants, 27 common parts were used. Nearly all of the parts were common to each of the three complications and sizes, and more than half were shared within each speed.

This entire series uses just six mainplates, each of the following in both 11.5 ligne and 13 ligne sizes

  1. No date (later dropped; the date version was used on the no-date calibres)
  2. Date only
  3. Day/date (0.5 mm thicker)

With three speeds available, there were also three balance/escape/fourth wheel assemblies. Those with a balance stop also had unique parts.

The family shared four mainsprings, 2 for the manual versions and 2 for the automatics.

(Current movements in bold)

WindingSize (ligne)Speed (bph)Day/DateDate OnlyNo Date
Manual11.521,600ETA 2808ETA 2802ETA 2800
28,800ETA 2810
ETA 2816
ETA 2816-1
ETA 2804
ETA 2804-1
ETA 2804-2
ETA 2801
ETA 2801-1
ETA 2801-2
36,000ETA 2812
ETA 2817
ETA 2806ETA 2819
1321,600ETA 2809ETA 2803
28,800ETA 2811ETA 2805
36,000ETA 2813ETA 2807
Automatic11.521,600ETA 2828ETA 2822ETA 2820
28,800ETA 2830
ETA 2836
ETA 2836-1
ETA 2836-2
ETA 2824
ETA 2824-1
ETA 2824-2
ETA 2821
ETA 2821-1
36,000ETA 2832
ETA 2837
ETA 2826
ETA 2826-2
1321,600ETA 2829ETA 2823ETA 2839
28,800ETA 2831
ETA 2838
ETA 2834
ETA 2834-1
ETA 2834-2
ETA 2825
36,000ETA 2833ETA 2827

Other variants

  • 1820 - 21,600 bph auto, 11.5 l (w/ or w/o hack)

2840 Series

The 2840 series was closely related to the 2800 series but was cost-reduced for use in Swatch-branded automatic watches. The calibres correspond with similar-numbered 2800 movements. Only the ETA 2846 (and perhaps the ETA 2842) were made available to other manufacturers.

2850/2870 Series

These differ from the 2800 series in layout but use many similar parts. They were intended as cost-reduced versions like the 2840 series, but retain dial feet and other features for use in serviceable watches.

WindingSize (ligne)Speed (bph)Day/DateDate OnlyNo Date
Manual11.521,600ETA 2859ETA 2853ETA 2851
28,800ETA 2858ETA 2852ETA 2850
Automatic11.521,600ETA 2879ETA 2873ETA 2871
28,800ETA 2878ETA 2872ETA 2870

2890 Series

The 289x movements are entirely different from the 2824/2836 line, being derived from the ultra-thin Eterna 1466. There have been three generations of this movement: The original 2890 and 2892 of the 1970's, the updated 2892-2 of the 1980's, and the modern 2892A2, introduced in 1999. Due to its thin profile and proven reliability, many modular movements use this calibre as a base. Notable among these is the ETA 2894-2 chronograph.

Valjoux 7750 Series

ETA's main integrated chronograph family is derived from the Valjoux 7750 line.

Winding Model Year 30 Minute Chrono 12 Hour Chrono Special Features
Automatic 7750 1973-present Yes Yes
7751 1986-present Yes Yes Full calendar with hands date, moon phase, 24-hours indication
7753 2002-present Yes Yes Minute counter at the 3 instead of the 12, date change by pushers at the 10
7754 2003-present Yes Yes GMT function on additional 24-hour hand
7757 1985-2003 Yes Yes Regatta countdown indication
7758 1985-2003 Yes Yes Moon phase
Manual 7760 1985-2005 Yes Yes
7761 1986-1998 Yes No
7765 1983-1998 Yes No Date
7768 1985-1998 Yes No Moon phase

6400 Series

Hand winding movements originally created by Unitas.

7000 Series

Hand winding movements originally created by Peseux.

Valgranges

OEM

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eta_calibres.txt · Last modified: 16.11.2021 10:01 by gerdlothar

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