Seiko Cal. 5644 - 563

This Spring Drive model from 1971 features a 44mm PVD Black case. With its 20mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-fec6e56da739]

Also known as: Pogue, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1971

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