Seiko Cal. 6688 - 139

This Hand-Winding model from 1971 features a 42mm Hardlex-Coated Steel case. Powered by the 6688 caliber with 21j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-62d6fce2fc79]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1971

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