Seiko Cal. 3866 - 694

Seiko 3866-694

The 3866-694 is a sought-after Solar piece from Seiko's golden era. Powered by the 3866 caliber with 21j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-2ba54053a090]

Also known as: Baby Tuna

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
13.3mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
70m
Dial Color
Green
Jewels
21j
Frequency
21,600 bph
Power Reserve
37 hours
Year
1983

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seikata-wm-2ba54053a090