WESTINGHOUSE RAPID Electric Coffee Grinder Mill Commercial Model 10 1928 WORKS! This coffee mill is a model 10 Westinghouse grinder, serial number 853. The grinder was made by Penn Scale and Mfg. Company. I think it was made in 1928. It has a 1/4 horsepower, 110 volt, 4.9 amp. Westinghouse Electric Motor, style 675310, with serial #.