This CD 112, also known as a "Keg" style
insulator, was manufctured for the
Southern Bell Telephone and Telegraph Company
in the early part of the last century.
Several different glass houses made insulators
for S.B.T.& T., including Hemingray, who probably
made those embossed between the wire grooves.
This insulator was removed from an abondoned
rural telephone line in Monroe county.