Seiko Cal. 7113 - 931

The Seiko 7113-931 represents an important milestone in Seiko's 1968 lineup. Powered by the 7113 caliber with 36j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-4edf0023a739]

Also known as: Sumo, World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1968

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