Seiko Cal. 4427 - 634

This Hand-Winding model from 1990 features a 40mm PVD Black case. Powered by the 4427 caliber with 27j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-98d31a1bfcfd]

Also known as: Navigator, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1990

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