Seiko Cal. 6634 - 578

The 6634-578 is a sought-after Solar piece from Seiko's golden era. Powered by the 6634 caliber with 33j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-4228be86bfcc]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1985

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