Seiko Cal. 6638 - 422

The 6638-422 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 18j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-ada298168da0]

Also known as: Bellmatic, Crown

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1988

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