Seiko Cal. 4436 - 663

Released in 1990, the Cal. 4436 with design code 663 was part of Seiko's domestic market collection. Powered by the 4436 caliber with 20j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-400ebdc6da34]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1990

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