Reference:

• 15640, Kal. Buren 15, blue or black ZB
• 73464, Kal. Valjoux 7734, blue ZB
• 1654, black ZB
• 7764MH, Kal. Valjoux 7730, black ZB

Movement:

• Self-winding chronograph movement calibre Buren 15, 21,600 A/h
• Ref. 73464 manual winding movement calibre Valjoux 7734, 18,000 A/h
• 17 jewels
• Power reserve 42h or 45 h

Case:

• Stainless steel
• Ø 43 mm, H 15 mm
• Mineral glass (Ref. 73464 and 1564 acrylic glass)
• Blue turning bezel
• Chrono pushers at 2 and 4 o'clock
• Screw-down caseback

Dial:

• Dark blue (or black) dial with subdial (Regatta counter)
• Small seconds at 10 h, date display at 6 h
• Indices and hands with luminous material

Functions:

• Hours, minutes, small seconds
• Date
• Chrono function seconds and 15 minutes regatta counter in three color zones

Bracelet:

• Leather strap with folding clasp or stainless steel bracelet

Prize:

• Approx. 2,000-2.500 EUR, according to singular model