Seiko Cal. 6644 - 530

This Spring Drive model from 1970 features a 37mm Hardlex-Coated Steel case. Powered by the 6644 caliber with 27j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-8e787d45db8a]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1970

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