Seiko Cal. 5637 - 365

This Spring Drive model from 1983 features a 46mm Gold-Plated case. Powered by the 5637 caliber with 25j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-712cfaa5a749]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1983

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