Seiko Cal. 6661 - 139

This Hand-Winding model from 1969 features a 36mm Titanium case. Powered by the 6661 caliber with 27j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-98949a52ce34]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1969

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