Seiko Cal. 7181 - 231

The Seiko 7181-231 represents an important milestone in Seiko's 1969 lineup. Powered by the 7181 caliber with 20j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-78975c6d3596]

Also known as: Samurai, Arnie

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1969

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