Seiko Cal. 5613 - 644

The Seiko 5613-644 represents an important milestone in Seiko's 1968 lineup. Powered by the 5613 caliber with 26j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-843257cc6dc6]

Also known as: Samurai, Sea Horse

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

26j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1968

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