Stewart Warner Hand Operated Tachometer. It is New Old Stock and includes two rubber tips and the original instructions in the original envelope. It measures about 2 3/4 inches in diameter. A great piece to measuring revolutions per minute (R.P.M.). A collectible that is a usable tool. The price is 125.00 USD plus shippingCall me at 734..
Broken down. Not working. Could bake a working engine from the 2. Found in grandfathers / uncles garage along with large amount of other de Dion parts..