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Edison Magneto was begat after Thomas Edison acquired the Splitdorf and Bethlehem operations and offered a line of ignition equipment briefly. Splitdorf made radios and many early magnetos and Bethlehem is probably best known for their spark plugs. The transition was probably near 1928-29. If the information needed is not listed under Edison then it may very likely be listed under Splitdorf. More to follow.
And if things are not complicated enough, Edison-Edison Splitdorf was later swallowed up by Wico. If you cannot make sense of Edison part numbers the Wico literature is a good place to look as described below.