Seiko Cal. 7057 - 731

The Seiko 7057-731 represents an important milestone in Seiko's 1975 lineup. Powered by the 7057 caliber with 21j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-4eca9c8b551a]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

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