Seiko Cal. 5645 - 748

This Spring Drive model from 1978 features a 41mm Stainless Steel case. It features a Silver dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-7f38c76c40f5]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1978

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