Seiko Cal. 5640 - 883

This Spring Drive model from 1988 features a 39mm Gold-Plated case. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-d922ff6139e6]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1988

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