Seiko Cal. 4423 - 109

This Spring Drive model from 1971 features a 35mm Stainless Steel case. Powered by the 4423 caliber with 25j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-d0e6259bd365]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1971

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