Seiko Cal. 7156 - 387

The Seiko 7156-387 represents an important milestone in Seiko's 1981 lineup. Powered by the 7156 caliber with 28j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-8b695f367ac3]

Also known as: World Timer, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1981

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