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CD 133.2
P. & W.
Perhaps a product of the Beaver Falls Glass Company of Pennsylvania, the CD 133.2 P&W is among the earliest of threaded insulators made. In fact, some CD133.2 insulators appear to have been pressed in the same molds that originally produced CD 728.2 theadless pieces. The addition of threads is noted by bold embossing on the skirt which reads:

L. A. C.
P & W

The letters L.A.C. refer to the inventor of the threaded pinhole for glass insulators, Louis A. Cauvet.

This example was found in February 2001 along one of the oldest railroads in Mississippi. After 120+ years "in the wild" it is still in VNM condition.