Seiko Cal. 6638 - 235

The Seiko 6638-235 represents an important milestone in Seiko's 1985 lineup. Powered by the 6638 caliber with 28j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-9cb9e978b378]

Also known as: UFO, Emperor

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1985

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