Seiko Cal. 5656 - 770

This Hand-Winding model from 1977 features a 40mm Gold-Plated case. Powered by the 5656 caliber with 18j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-eec25ae12a91]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1977

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