Seiko Cal. 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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