During the period between 1969 to 1971, I made several trips to hunt insulators on the Central of Georgia Railway telegraph line North from Macon, Georgia to Athens, Georgia. My favorite section was between Godfrey, GA to Madison, GA. My notes indicate the line had four tiers of insulators which were mostly common types including aqua CD 145 W. Brook, CD 145 B, CD 133 /134 W. Brookfield insulators. Although, this was a typical Western Union telegraph line there were no CD 127 or CD 126.3 insulators - only CD 126 dome embossed Brookfield's. The unique insulators in this section also included: three new signals that were not in my collection. This was the third unique signal style insulators. The exact embossing on the middle signal is as follows:

CD133.3 Bar and Reverse 3 (Front) & Bar (Reverse) Greenish-Teal-Green with some cull stones and milk.

This post compares the CD 133.3 verses a CD 134 Brookfield and a CD 134 Patent Dec. 19-1871 found in Iowa.