Seiko Cal. 4437 - 556

Released in 1967, the Cal. 4437 with design code 556 was part of Seiko's domestic market collection. Powered by the 4437 caliber with 24j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-76f36fe9af5d]

Also known as: Monster, World Timer

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1967

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