Seiko Cal. 6640 - 549

This Solar model from 1968 features a 40mm Stainless Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-5c726091220c]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1968

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