1. Action de F100, yellow & black. 2. 2 Actions de F100, green &black. Heavy folds and a little staining and small edge-split. Ebonite, or hardened rubber, was the result of the process of vulcanization, or adding sulphur to raw rubber. This increased its resistance and elasticity. Ebonite was used for combs, buttons, jewelry, pens, musical instruments, etc. In 1839 Hancock in England and Goodyear in USA both discovered this process. Charles Goodyear (1800-60) was unsuccessful in exploiting his process, and died in poverty. His son, also Charles (1833-96), was more successful, although the Goodyear Tire & Rubber Company was not formed until 1898, after his death. The French company issuing this certificate, formed 1854, had rights to manufacture under the Goodyear patent. As such it is the earliest 'Goodyear' scripophily known to us and extremely rare.
Startprice: € 300