Seiko Cal. 6645 - 604

This Spring Drive model from 1972 features a 38mm Titanium case. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-9ebab48b086f]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1972

Related Models

• Seiko 4436-410
• Seiko 6210-918
• Seiko 7010-666
• Seiko 7166-470
• Seiko 7186-760
• Seiko 6123-424
• Seiko 3872-303
• Seiko 3829-443
• Seiko 6156-265
• Seiko 4462-615
• Seiko 4453-395
• Seiko 0743-358