Seiko Cal. 7040 - 640

Seiko 7040-640

The 7040-640 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-343ab5209b8f]

Also known as: Bullhead, Helmet

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
13.6mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Blue Sunburst
Jewels
20j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1986

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seikata-wm-343ab5209b8f