Seiko Cal. 6318 - 677

This Hand-Winding model from 1972 features a 40mm Gold-Plated case. Powered by the 6318 caliber with 25j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-5ad9c88cb1d7]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1972

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