Seiko Cal. 6640 - 742

This Spring Drive model from 1984 features a 46mm Stainless Steel case. It features a Burgundy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-c4f9b1750e05]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

34j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1984

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