Joe Maurath, Jr. asserts within his contributions to the McDougalds' Insulator Research books (1990) that the T-H.E. Co. marked insulators were manufactured for the Thomas-Houston Electric Company by the Brookfield Glass Company (New York) between the 1880's and 1892. During the latter year the General Electric Company was formed among a composite of a myriad of smaller electric companies including Thomas-Houston (who were a electrical jobber/supplier) which formed General Electric. The insulators made for Thomas-Houston are mostly known in the CD 134 (single petticoat) style. Other designs were made (see elsewhere). Most of the Brookfield CD 134 insulators are aqua however light green to dark olive examples are known (in addition to the dark amber ones). The Brookfield ones are skirt-embossed. The example shown was made in a two-piece mold (like most other Brookfield T-H.E's). And it is unique with its slimy-light green color with swirls, bubbles, mini-rocks and other debris about making it look like a wild cloud formation!