Seiko Cal. 5653 - 715

This Spring Drive model from 1979 features a 45mm Hardlex-Coated Steel case. It features a Silver dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-8f4b4c2af69a]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1979

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