Seiko Cal. 5291 - 390

This Spring Drive model from 1974 features a 42mm Titanium case. Powered by the 5291 caliber with 31j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-f597b1e086de]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1974

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