Collectible! Rare! I am offering a functional, rare, antique, first in history Czechoslovak watch PRIM "SPARTAK", 15 jewels, marked with the PRIM logo (rare, early marking). Low production number 3941. Rare, caliber K25 movement. Everything is original, it is not a puzzle! The watch case is in good condition and the dial is preserved. New strap. New crystal. Overall, nice condition!

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https://www.ceskatelevize.cz/porady/12189981975-cesty-za-hodinarskym-umenim/218562260290003/