Seiko Cal. 0731 - 985

The 0731-985 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0731 caliber with 35j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-0aaa00d8cf03]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1977

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