Seiko Cal. 7140 - 728

The Seiko 7140-728 represents an important milestone in Seiko's 1981 lineup. Powered by the 7140 caliber with 19j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-c938aa43778d]

Also known as: Samurai, Goldfeather

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1981

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