Seiko Cal. 0731 - 277

The Seiko 0731-277 represents an important milestone in Seiko's 1991 lineup. Powered by the 0731 caliber with 26j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-12532c951547]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1991

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