Seiko Cal. 6636 - 885

The 6636-885 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 30j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-3dec1ada7f1e]

Also known as: Bellmatic, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1978

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