Seiko Cal. 6645 - 304

This Spring Drive model from 1970 features a 46mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-2599330c0707]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

32j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1970

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