From Left: C.D.&.P.T.Co. Elmer ring in pin hole yellow green. Notice period after & C.D.& P.T.Co. Elmer ring in pin hole green C.D.&.P.T.Co. Elmer ring in pin hole blue. Has period after & I would think these were made at Elmer glass plant. Same colors you will find in Star embossed pieces with the Elmer ring.

C.D.& P.TEL CO D on dome light yellow green, no periods after TEL or CO with large O C.D.& P.TEL Co. Backwards 1 on dome with base line, no periods after TEL with small o an unlisted icy mint green. I would think these were made by Brookfield by the shape of the toll and dome shop markings.