U.S.A. (1894) Glass cutter*. Pressure gauges*. Postal card (N) with advertisement for W & C Gage Glass Cutter. Cuts a Perfect Circle.
AVAILABLE AT $80
BELGIUM (1950) Crystal. Belgian publibel (N) No 912 with advertisement for "Cristal du Val St. Lambert - Le cadeau qui s'impose." Attractive!
AVAILABLE AT $15
U.S.A. (1940) Flex-O-Glass*. Postal card (O) with advertisement on back for Glass Substitute - Flex-O-Glass. Also Window-Fabric, Glass-O-Net, and Wyr-O-Glass. Fascinating!
AVAILABLE AT $20
U.S.A. (1920) Cartoon caricature of window washing*. Two cent (overprinted 1c) cent (UX32) postal card (O) with illustrated ad on reverse for Sun Window Cleaning.
AVAILABLE AT $20
U.S.A. (1887) Window glass. Natural gas. 1c postal stationery envelope with ad.
AVAILABLE AT $12