Seiko Cal. 6646 - 153

This Hand-Winding model from 1972 features a 40mm Titanium case. It features a Silver dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-989394d7e201]

Also known as: Shogun, Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1972

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