A small, desk-top telephone wired to a wooden case. The phone is a French-style unit with no dial - a button activates the unit. Nameplate reads: "Marvel-Phones / Lift / Hand Phone / Then Listen / ...
AN article by A. Herckmans (Bell Lab. Rec., 21, No. 2; October 1942) describes a new amplifying set which recently has been developed for use with the regular telephone set to assist the hard of ...
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