Seiko Cal. 6638 - 299

The 6638-299 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6638 caliber with 20j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-22bca20d9c6c]

Also known as: Monster, Golden Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1996

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