Seiko Cal. 6636 - 390

The 6636-390 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6636 caliber with 20j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-7819a8c0724a]

Also known as: Bellmatic, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1978

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