Seiko Cal. 5681 - 101

This Hand-Winding model from 1975 features a 45mm Hardlex-Coated Steel case. Powered by the 5681 caliber with 18j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-49bdd97312b2]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1975

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