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 ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback