Seiko Cal. 3840 - 552

The Seiko 3840-552 represents an important milestone in Seiko's 1966 lineup. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-2de1684e2c69]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1966

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