Here are the six known CD's made by the B.G.M.Co. from left to right: (CD 102, 133, 134, 145, 162, and 164). Most BGM insulators are purple as they likely made clear glass that turned purple in the sun over time. BGM went out of business after loosing a patent suit with Brookfield. Some Brookfield insulators can be found with B.G.M.Co. blotted out.