Seiko Cal. 4456 - 398

This Spring Drive model from 1971 features a 42mm Stainless Steel case. Powered by the 4456 caliber with 24j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-d417dc2b7e08]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1971

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