Seiko Cal. 6640 - 742

This Hand-Winding model from 1967 features a 45mm PVD Black case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-ffbcda31b403]

Also known as: Samurai, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1967

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