Seiko Cal. 6638 - 320

The 6638-320 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 32j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-ab6205ef5c9f]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1994

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