Seiko Cal. 6638 - 876

The 6638-876 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6638 caliber with 21j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-56c86f4c048f]

Also known as: Samurai, Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1969

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