Seiko Cal. 4446 - 172

This Spring Drive model from 1975 features a 40mm Stainless Steel case. Powered by the 4446 caliber with 19j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-f96a03bb7d1c]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1975

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