Seiko Cal. 7131 - 320

The Seiko 7131-320 represents an important milestone in Seiko's 1991 lineup. Powered by the 7131 caliber with 34j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-010f3cbba676]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1991

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