N. R. "Woody" Woodward is the author of THE GLASS INSULATOR IN AMERICA, 1988 Report and developed the Consolidated Design Numbers identification system for glass insulators. 

QUESTION: When I was at the London (Ohio) show last fall, I picked up a CD 121 AM. TEL. & TEL. Co. toll because of its unusual, large, crude embossing. A rubbing of the embossing (actual size) is shown. It is twice the size of any other that I've seen. I would appreciate anything you can tell me about this insulator. George Toften, Middleburgh, NY

The "AM" is lower than the rest of the embossing.
There is no space between the "M" and the 'T'.
"TEL" is higher and offset from the rest of the embossing.

The center of the "A" is tipped down to the right.

The tops of the letters "A" and the "M" are rounded.

The color is dark aqua. There is heavy ghost lettering above the embossing on the skirt. The size seems to be shorter than my other CD 121 types.

WOODY: I know the AM. TEL. & TEL. Co. piece. I have it in my files: but no clue as to who made it. It is most unlikely that it was made by Brookfield or Hemingray. If one could tell exactly where it was in service on the line, it might help.