Seiko Cal. 6631 - 271

This Automatic model from 1965 features a 35mm Titanium case. Powered by the 6631 caliber with 32j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-4a70af2df86a]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

35mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1965

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