Large brass semi-circular protractor of an unusual and rare form.
Dimension 20,4 x 11,3 cm and 25,4 cm for the index.
It is divided into 4 parts (0-45 °), it allows to trace parallel lines and carries the indication of four cardinal points in Italian (or wind direction), from left to right: P (Ponente-West), M (Maestro- NW), T (Tramontana-N) and G (Greco-NE).
This large protractor was certainly designed for cartographic purposes.
Very good condition, beautiful original patina, untouched.
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Alpha Et Omega
Alpha et Omega is a recently established firm, based in Milan, Italy. We specialise in antique Scientific Instruments and rare Books to supply collections worldwide. Focus is given to optical and time-related instruments, especially before the Industrial Revolution but we are also interested in rare-to-find scientific and natural items and wunderkammer objects. Alpha et Omega also deals in rare books related to Early Science and Scientific Instruments. Please feel free to contact us for individual requests or desiderata.