Seiko Cal. 5666 - 645

Seiko 5666-645

The 5666-645 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5666 caliber with 29j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-8a5d4aee36ce]

Also known as: Sea Horse, Flighty

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
14.7mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
50m
Dial Color
Blue Sunburst
Jewels
29j
Frequency
36,000 bph
Power Reserve
45 hours
Year
1967

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