Seiko Cal. 6640 - 729

Seiko 6640-729

The Seiko 6640-729 represents an important milestone in Seiko's 1973 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-6b9c8989cc0f]

Also known as: Turtle, Sea Horse

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
45mm
Case Thickness
10.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Green
Jewels
32j
Frequency
28,800 bph
Power Reserve
53 hours
Year
1973

Related Models

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