Seiko Cal. 4494 - 640

The 4494-640 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4494 caliber with 19j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-13e1051c5c5b]

Also known as: Sumo, Flighty

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1987

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