Seiko Cal. 5690 - 367

This Spring Drive model from 1971 features a 41mm Stainless Steel case. Powered by the 5690 caliber with 28j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-87e630835d32]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1971

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