Seiko Cal. 4457 - 638

The 4457-638 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4457 caliber with 21j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-ebd835fcd337]

Also known as: Pogue, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1995

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