Hemingray made three different styles of AM. TEL.&. TEL.CO. (American Telephone & Telegraph Company) CD 106, CD 121 and CD 190/191. The CD 106 is one of a kind. The CD 121 has several embossing variations and colors. It is important to note Hemingray was not the only glass company to manufacture the CD 121 AM Tel insulators. If you are familiar with Hemingray insulators they are easy to identify by some common hemingray characteristics. Same is true with the CD 190/191. All the Hemingray made CD 190/191s also have “TWO PIECE / TRANSPOSITION” embossed on them. Units with just AM Tel are not Hemingray made.

Some of the ways to tell a Hemingray made AM. TEL.&. TEL.CO. are:

• Always 3 pice mold. The 2 pice molds are likely Brookfield.
• NO dome letters or numbers, Again most likely Brookfield made.
• Large “O” in “CO” to date, none of the units with small “o” have turned out to be Hemingray.
• Sharp mold lines, Just like most Hemingray insulators, these have a really crisp mold line when compared to, say a Brookfield.
• Crisp stamped embossing. (there are also prism styled CD 121 and CD 190/191s). Be carful to not mistake the Denver style thin embossing. If you are familiar with Hemingray insulators you can easily tell the difference.

Photo compliments of:
(*BM) = Bill Meier
(*SK) = Shaun Kotlarsky