Seiko Cal. 5666 - 810

The Seiko 5666-810 represents an important milestone in Seiko's 1973 lineup. Powered by the 5666 caliber with 29j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-75bf95749399]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1973

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