Seiko Cal. 6638 - 637

The 6638-637 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6638 caliber with 19j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-101219cbb9fb]

Also known as: Panda, Emperor

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

19j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1985

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