Seiko Cal. 7163 - 413

This Spring Drive model from 1977 features a 36mm Two-Tone case. Powered by the 7163 caliber with 31j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-ff2eedd0781b]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1977

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