The large snow white glaze porcelain strain on the left is marked in blue ink with what I believe is the SETO Japan trademark. (Most books focus on porcelain decorative export items and not utilitarian items like insulators). This factory is one of Japan's oldest tracing its origins back to Seto, Japan in 1230. They began making insulators in circa 1908. This region of Japan had a rich supply of clay for making porcelain so that today nearly 60 porcelain factories are located here. Even the famous NGK porcelain insulators has a factory here. SETO is so famous in Japan that it has become an everyday word like Xerox is in the USA.

This insulator was made sometime between 1907-1941. It is 4 inches long by about 3 1/8" wide. Fingernail flake caused by popped air bubble and small glazed over crack-from factory and forgiven by most porcelain enthusiasts. First email gets it for only $25 plus postage. Thanks

The small unmarked strain on the right is of unknown manufacture but was found in South America. It's 2.5" x 1 7/8" wide. Crude, VNM+ shape with only a fleabite flake and two factory pinhole size popped glaze bubbles. Has two holes for securing guy wires at different angles. First email gets it for $7 plus postage. Thanks (Buy them both for only $30 and save $2)