Seiko Cal. 4427 - 840

The Seiko 4427-840 represents an important milestone in Seiko's 1972 lineup. It features a Silver dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-96fe4e4e3e51]

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1972

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