Seiko Cal. 5646 - 155

This Hand-Winding model from 1975 features a 37mm PVD Black case. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-df21dc7255bb]

Also known as: Samurai, Silverwave

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1975

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