Seiko Cal. 5651 - 637

This Quartz model from 1981 features a 42mm PVD Black case. Powered by the 5651 caliber with 33j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-e38ab9a1194a]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1981

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