Seiko Cal. 6643 - 761

This Automatic model from 1968 features a 43mm Titanium case. It features a Cream dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-9eab2c2c73f7]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1968

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