Seiko Cal. 6644 - 364

This Hand-Winding model from 1996 features a 46mm PVD Black case. It features a Green dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-6c4b7a166cfd]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1996

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