Seiko Cal. 5637 - 377

This Hand-Winding model from 1980 features a 38mm Gold-Plated case. Powered by the 5637 caliber with 35j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-5c8473af5650]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

35j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1980

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