Seiko Cal. 6645 - 925

This Hand-Winding model from 1968 features a 43mm Hardlex-Coated Steel case. It features a Green dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-d8596cc8ccb1]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1968

Related Models

• Seiko 4441-801
• Seiko 5655-671
• Seiko 7162-612
• Seiko 4476-154
• Seiko 7168-613
• Seiko 4427-527
• Seiko 5285-400
• Seiko 6640-293
• Seiko 4561-614
• Seiko 6384-412
• Seiko 6111-881
• Seiko 5635-536