Seiko Cal. 6644 - 135

This Automatic model from 1966 features a 34mm Titanium case. Powered by the 6644 caliber with 34j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-05d100c10f0c]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1966

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