Seiko Cal. 5644 - 961

This Spring Drive model from 1965 features a 44mm Hardlex-Coated Steel case. Powered by the 5644 caliber with 24j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-f91d62d3bf24]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1965

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