Seiko Cal. 6693 - 638

The 6693-638 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6693 caliber with 24j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-64f61841637d]

Also known as: Bullhead, Rally

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1977

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