Seiko Cal. 6663 - 636

The 6663-636 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6663 caliber with 31j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-724215eeddb9]

Also known as: World Timer, Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1993

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