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Commercial Invoice for a Barometric Altimeter by L. Maxant (1949)
Cat. No. PRT-2025-017
This document is a commercial invoice issued by the French precision-instrument manufacturer L. Maxant, a well-established supplier of barometric, meteorological, and industrial measuring instruments in the mid-20th century. Dated 6 July 1949, the invoice records the sale of a barometric altimeter (Baromètre altimétrique n° 866 M, calibrated to 3000 meters), including packaging and postal charges, supplied to Maison Hertz in Roanne.
