Seiko Cal. 6643 - 637

This Hand-Winding model from 1994 features a 42mm Titanium case. Powered by the 6643 caliber with 34j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-475dec393da0]

Also known as: Helmet, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1994

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