Made in the 50ties / 60ties by Manufacture d'Horlogerie Precimax S.A., founded in 1933 by S. Tripel in Neuchatel/Switzerlsand. In 1951 Precimax took over the Helios SA located in Porrentruy. Models known as being Precimax, Helios, Perfecta, Exactus.
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