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1940 - 1953
unknown start date - pre circa 1915 circa 1915 - circa 1919 circa 1919 - circa 1924 1925 - 1935 1937 - 1940 1953 1954 - 1958
Dry processed, 3-piece molds, skirt & petticoat fire rested.
Purchased by McGraw Elect. Co. in 1953. Line Material Co. (a subsidiary co.)ran the Macomb Ill. plant and incised markings "IEP/1954" which still represented "Ill. Elect. Por.". In 1958 Thomas A. Edison Ind. merged with McGraw and though the "IEP" marking continued the "E" now stands for "Edison".
Incuse with "dot codes" and the addition of model number "237"
Just guessing these markings are transitions from the dated ink stamps after 1940 to the dated incused mark from 1953.
Incised on skirt "Illinois/1953"
Ink stamped "Date/State/Model"
Incuse "Date/State/Model" marking.
Ink stamped, no mold lines, skirt & petticoat fire rested.