Shown are 4 CD 120.2's believed to be made by Wormser Glass Works, Pittsburgh, Pa. They are know to have made insulators in the 1870's and 80's. It is thought the common purple (not really that common) NN 133.4 bullet was made by this glass house. Mold characteristics have made most who study this stuff to believe these came from the same source. Scarce to rare, they are also known in a darker purple than these four.