Seiko Cal. 6640 - 225

Seiko 6640-225

The 6640-225 is a sought-after Spring Drive piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-5ca95f0d7f62]

Also known as: Flighty

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
11.1mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
36,000 bph
Power Reserve
47 hours
Year
1981

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