The CD 145 dome embossed W. Brookfield was common on the Central of Georgia Railway telegraph line. Often there were three or more on each pole. Colors ranged from aqua to blue aqua, shades of green, and shades of SCA. This is a CD 145 W. Brookfield (arched) / 45 Cliff St. /N.Y. on the front dome and Pat'd Nov 13th (th underline) 1883 (arched) / Feb 12th (th underline) 1884 on the back dome in a nice shade of yellow green. The mould mark on this insulator is "IO" Unlike the purple CD 145 Brookfield's, the green shades were found at random over the main North - South line between Griffin and Albany, GA.