Seiko Cal. 7156 - 331

Released in 1983, the Cal. 7156 with design code 331 was part of Seiko's domestic market collection. Powered by the 7156 caliber with 35j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-2ff582ac4a8f]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1983

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