“TRIMM FEATHERWEIGHT” earphone
Made by “TRIMM INC. of LIBERTYVILLE, ILL., U.S.A.”
Its earpiece is at the end of an extendable (bakelite, probably) handle, about 10″ long when collapsed and 16″ when fully extended. Its cloth covered cord is still in perfect condition, with a right angle 1/4″ phone plug (by SWITCHCRAFT) on its end.