Seiko Cal. 7156 - 997

This Hand-Winding model from 1971 features a 42mm Two-Tone case. Powered by the 7156 caliber with 31j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-84f3d0ee8a82]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1971

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