Seiko Cal. 6636 - 360

The 6636-360 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 22j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-7510d7502c0b]

Also known as: Bullhead, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1999

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