Seiko Cal. 5644 - 975

This Solar model from 1966 features a 41mm PVD Black case. Powered by the 5644 caliber with 25j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-a382d252fa86]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1966

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