Seiko Cal. 4443 - 510

The Seiko 4443-510 represents an important milestone in Seiko's 1974 lineup. Powered by the 4443 caliber with 27j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-7dca19c44c22]

Also known as: Helmet, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1974

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