Seiko Cal. 6640 - 991

This Automatic model from 1984 features a 35mm PVD Black case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-1992f3530bd2]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1984

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