Seiko Cal. 4440 - 620

This Spring Drive model from 1986 features a 35mm Hardlex-Coated Steel case. Powered by the 4440 caliber with 19j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-745070182020]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1986

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