Seiko Cal. 4440 - 577

This Spring Drive model from 1966 features a 37mm PVD Black case. Powered by the 4440 caliber with 17j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-f93f5f52e704]

Also known as: Crown, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1966

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