Threadless InsulatorsThreadless Insulators

Threadless porcelain date to the 1850's and were used during the Civil War. After the development of threaded glass in 1865, porcelain fell out of favor for telephone or telegraph due to the higher cost, and the lack of transparency. Very little porcelain was made between 1870 and 1890. Virtually all porcelain threadless are very rare.

[ Back | Up | Next ]