Seiko Cal. 4581 - 644

The 4581-644 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4581 caliber with 17j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-3cfa733fcda2]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1968

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