Seiko Cal. 4424 - 138

Released in 1972, the Cal. 4424 with design code 138 was part of Seiko's domestic market collection. Powered by the 4424 caliber with 34j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-e678fa153ead]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1972

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