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Gallery: 14 of 21

Baltimore Glass Manufacturing Company, 1896 to 1903 (est.), shut down by court order for patent infringement-- caught using a copy of the Kribs press for making their insulators, a device patented by Brookfield, who won their molds and press(es?) in the lawsuit. Brookfield then reworked the molds to remove the old embossing, filling in the "B.G.M. CO." with blot-outs and re-engraving with "NEW YORK". "BROOKFIELD" was added to the previously blank other side.

Most B.G.M. insulators are purple, with a few in off-clear and lemon; the Brookfield units are almost always light aqua, anything else is rare. B.G.M. glass is notoriously fragile and the insulators are usually chipped; the darker the shade, the more likely the damage it seems. The better condition pieces are often lighter colored, perhaps because they led more sheltered lives?

B.G.M. molds are unique; the insulators made with them have a distinctive profile unlike any other. Study the pictures below paying particular attention to the profiles and the blot-outs will start to stand out on a crowded table of aquas at shows.

CD
102
"Ice Purple" border=0 CD 102 B.G.M.
Ice Purple
"Purple" border=0 CD 102 B.G.M.
Purple
"Dark Purple" border=0 CD 102 B.G.M.
Dark Purple
"Light Aqua" border=0 CD 102 B.G.M. blot-out
Lt Aqua Blot
    CD
    133
"Light Purple" border=0 CD 133 B.G.M.C.
B.G.M.C.
"Light Purple" border=0 CD 133 B.G.M.
Light Purple
"Light Aqua" border=0 CD 133 B.G.M. blot-out
Light Aqua Blot
CD
134
"Off Clear" border=0 CD 134 B.G.M. w/Bruise
Off Clear
"Purple" border=0 CD 134 B.G.M.
Purple
"Light Aqua" border=0 CD 134 B.G.M. blot-out
Light Aqua Blot
    CD
    145
"Light Lemon" border=0 CD 145 B.G.M.
Light Lemon
"Medium Purple" border=0 CD 145 B.G.M.
Medium Purple
"Dark Purple" border=0 CD 145 B.G.M.
Dark Purple
"Light Aqua" border=0 CD 145 B.G.M. blot-out
Light Aqua Blot
CD
162
"Ice Purple" border=0 CD 162 B.G.M.
Ice Purple
"Dark Purple" border=0 CD 162 B.G.M.
Dark Purple
"Green" border=0 CD 162 B.G.M. blot-out
Green Blot
    CD
    164
"Purple" border=0 CD 164 B.G.M.
Purple
"Purple" border=0 CD 164 B.G.M.
Purple
"Light Aqua" border=0 CD 164 B.G.M. blot-out
Light Aqua Blot