Seiko Cal. 5644 - 934

The 5644-934 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5644 caliber with 18j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-6c3c05aa409d]

Also known as: UFO, Crown

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1979

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