Seiko Cal. 6646 - 807

The 6646-807 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6646 caliber with 32j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-6212872a966f]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Burgundy

Jewels

32j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1975

Related Models

• Seiko 7174-838
• Seiko 7133-472
• Seiko 6218-155
• Seiko 4513-237
• Seiko 6364-906
• Seiko 5666-291
• Seiko 4488-835
• Seiko 7117-310
• Seiko 5296-179
• Seiko 7091-558
• Seiko 7158-744
• Seiko 6342-819