Seiko Cal. 6638 - 473

The 6638-473 is a sought-after Hand-Winding piece from Seiko's golden era. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-fc72be48cd03]

Also known as: UFO, Flighty

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1974

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