Seiko Cal. 5640 - 971

This Automatic model from 1981 features a 46mm Gold-Plated case. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-bc7790ccba33]

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1981

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