Seiko Cal. 6677 - 920

This Hand-Winding model from 1977 features a 35mm Hardlex-Coated Steel case. Powered by the 6677 caliber with 30j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-9508612bda9a]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1977

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