Seiko Cal. 6640 - 744

Seiko 6640-744

The Seiko 6640-744 represents an important milestone in Seiko's 1983 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-06f402e792aa]

Also known as: Turtle, Arnie

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
11.7mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
100m
Dial Color
Silver
Jewels
21j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1983

Related Models

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