Trade card of A H Rodanet & Cie, chronometer manufacturers, c 1900.
© Science Museum / Science & Society Picture Library
A promotional trade card published by A H Rodanet & Company of 38 Rue Vivienne in Paris. Rodanet made chronometers and also sold a range of high quality clocks and watches from leading Swis manufacturers such as Patek. Their trade card gives instructions for using the chronometers and a table of adjustments for places around the world. On the right hand side are examples of medals awarded to the firm.