This is a really neat art deco design/style hearing aid and small booklet calls it-- "THE NEW SILVER ANNIVERSARY MODEL "28". Looks complete w/transmitter and cord, Receiver and cord L&R earpieces, aux. Receiver and cord Vol control, 2 double duty batteries, Mic stand, Headband and carrying case + small booklet and larger pamphlet. Back of transmitter has PATENT NUMBER 844635. The stand and of/off switch housing are bakelite. This medical hearing aid was put out by Dictograph Products Corp. New York and booklet is dtd 1928. Some excerpts from booklet; The Acousticon...conceded for 25yrs to be the world's standard for aids to hearing...has added the NewSilver Anniversary Model 28 to solve this difficult problem. a new model of utmost efficiency and exquisity beauty...25yrs of experience concentrated into it...worthy of the name "Acousticon." BEGINNING RULES-- #1 Hold the earpiece to your ear in your hand so that the ear may become accustomed to the contact. #2 For the first few days practice 1hr at a time. time should be increased gradually, #3 Have 1 person at a time talk directly into the transmitter, t should be no other noise around. #4 Don't attempt to hear at the start at too great a distance-that will come after practice. #5 advisable to wear the transmitter on the outside of your clothing for the 1st wk. #6 Exercise both ears daily for at least 1 hr #7 Adjust vol to suit yourself. 104 variations at your command. #8 At start always be sure to face speaker. #9 500,000 Acousticon owners will counsel you: "Be patient, you have all to gain and nothing to lose." #10 If t is anything in this book perfectly unclear to you write our nearest branch office immediately. ALSO pics of how to wear, and trouble shooting , etc. Pamphlet cover: WITH-A-NEW-EARPIECE-NO-LARGER-THAN-A-DIME AND I CAN HEAR AGAIN. The new Acousticon Model 28 - $75 Model 56 $95 !!! && Letters from customers praising the Acousticon,etc. Really neat item and have never seen before. Box is 8" sq. The leattte carrying case is in very nice cond. w/just some slight wear to bottom - storage box bottom has gotten some moisture damage to cloth lining. Overall this Acousticon is in nice condition-little corrosion to couple metal parts(will clean) - NO breaks-NO cracks- may never have been used? NO RESERVE. $14.95 postage to the lower 48states. Others may be more. thanks and have a nice day.