====== Ebel 1911 BTR Automatic Chronograph Calibre 139 ======
{{wst>image_cr|Ebel|1911 BTR Automatic Chronograph Kaliber 139|Ebel 1911 BTR Automatic Chronograph Calibre 139}}

**1911 BTR Automatic Chronograph Calibre 139** is a [[chronograph]] by [[Ebel]].

Twenty years after the introduction of the legendary line 1911 with its distinctive hexagonal case the "Architects of Time" presented in October [[2006]] the revised Ebel men's collection [[Ebel 1911 BTR|1911 BTR]], a contemporary, purely mechanical and especially masculine watch series which draws attention to itself by a diameter extended to 44.5 mm and a larger [[bezel]].

On the [[Baselworld]] [[2007]] the Calibre 139 was presented. It is the fourth in-house Ebel [[automatic]] movement. It is based on the high-precision Ebel Calibre 137 from the year [[1995]], but was extended to a remarkable display of the conventional [[totaliser]]s to facilitate the reading of elapsed times.

By this the "Architects of Time" solved a well-known problem in an innovative way Conventional [[totaliser]]s are very small, which is why they are not read quickly and accurately. Therefore, the chronograph indications of this model appear in view windows rather than round [[totaliser]]s. The dial has been interpreted as a separate architectural structure and could accommodate perspective and relief effects, while the hours hand stands in the foreground as a striking element.

The chronograph minutes counter was shifted from his traditional position to 3 o'clock to appear in the form of a 120° counter. Thus, the readability of the display is greatly improved. Once an arm of the three-armed minutes counter hand has counted 30 minutes, the second arm takes over timing exactly where the first has begun its course in the zero start position. The hours display of the chronograph differs also from the conventional counter format a disk partitioned from 1 to 12 rotates under the dial and shows the hours running in a window at 6 o'clock. The chronograph stop hand maintains its position in the center.

Through the [[sapphire crystal]] caseback with the signature "Architects of Time" the compass-like [[weight segment]] can be admired.


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**Reference:**
  * 1215786

**Movement:**
  * Ebel [[manufacture]] calibre 139, 28,800 A/h
  * [[Self-winding]] [[chronograph]] movement
  * [[COSC]] certified [[chronometer]]
  * Bi-directional winding ball-bearing [[rotor]]
  * 27 [[jewels]]
  * 322 components
  * Power reserve 48 h

**Case:**
  * [[Stainless steel]], limited to 100 pieces in 18K-750 4N [[red gold]]
  * Ø 44.5 mm, height ? mm
  * Alternately [[satin-finished]]/polished
  * [[Sapphire crystal]] with [[anti-glare treatment]] on both sides
  * [[Sapphire crystal]] caseback
  * [[Screw-in crown]] fluted, in [[polished]] stainless steel, coated with black [[rubber]]
  * Pushers coated with black [[rubber]] and protective covers in [[stainless steel]]
  * [[Waterproof]] to 100 m

**Dial:**
  * [[Skeletonized]] dial, black
  * Three-armed [[small second]] at 9 o'clock, three-armed minutes counter hand at 12 o'clock and hours indication at 6 o'clock, each as viewing panels
  * Enlarged date window at 3 o'clock
  * [[Luminous coating]] [[Superluminova]] on dial (quadratic indexes) and hands

**Functions:**
  * Hours, minutes, seconds, date
  * Chrono seconds
  * Rapid calendar advance
  * [[Tachymeter]] scale

**Bracelet:**
  * Hand-sewn black Alligator leather strap with safety [[folding clasp]]
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{{tag>Watch_models Chronographs Ebel_models}}