Seiko Cal. 6645 - 742

This Hand-Winding model from 1993 features a 42mm Gold-Plated case. Powered by the 6645 caliber with 31j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-1145c73e1aad]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1993

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