(Patent office label missing); together with a patent model of a wash boiler, constructed of tin (Patent office label missing)--11½in. high, 5in. high (2)" /> A MODEL OF AN IMPROVED WASHING MACHINE, circa 1876, constructed of chestnut and tin, stamped <I>"CENTENNIAL WASHER"</I> (Patent office label missing); together with a patent model of a wash boiler, constructed of tin (Patent office label missing)--<I>11½in. high, 5in. high</I> (2) | Christie's