Seiko Cal. 7139 - 551

This Hand-Winding model from 1978 features a 42mm Hardlex-Coated Steel case. Powered by the 7139 caliber with 35j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-15b319ade4bf]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1978

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