Seiko Cal. 5640 - 920

This Spring Drive model from 1993 features a 41mm Gold-Plated case. Powered by the 5640 caliber with 26j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-6f55104007ac]

Also known as: Bullhead, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1993

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