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Archival description
The Central Institute for the Deaf-Max A. Goldstein Historic Devices for Hearing Collection.
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Sonotone Model 900, ca. 1945

Silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half. Serial no. 959159

Sonotone Model 900, ca. 1945

Silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half.

Sonotone Model 900, ca. 1945

Tarnished silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half. Serial no. 953189.

Sonotone Model 900, ca. 1945

Silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half. Serial no. 908463.

Sonotone Model 900, ca. 1945

Silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half. Serial no. 907318.

Sonotone Model 900, ca. 1945

Silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half. Serial no. 918065.

Sonotone Model 900, ca. 1945

Silver metal, one-piece, 3 vacuum tube body aid with grey plastic backing and middle insert, microphone grill on upper front is square with a gold lyre design insert, two dials on top, one cord for ear receiver/bone conduction plug on top, one plug in at bottom for optional two-piece battery pack, gold clip on back and battery door swings out from lower back side half. Excellent condition. Serial no. 946704.

Telex Model Super, 1944?

One silver, one-piece, 5 vacuum tube body aid with ivory colored plastic insert, gold engraved clip on front that hides the microphone opening, one volume control dial on top, one on/off switch on top, and one "HI MED LOW" switch on inside of battery compartment. Battery door swings out from lower bottom half of back side. "Super TELEX" engraved on front. Styled like the Telex 200.

Telex Model Super, 1944?

One silver, one-piece, 5 vacuum tube body aid with ivory colored plastic insert, gold engraved clip on front that hides the microphone opening, one volume control dial on top, one on/off switch on top, and one "HI MED LOW" switch on inside of battery compartment. Battery door swings out from lower bottom half of back side. "Super TELEX" engraved on front. Styled like the Telex 200.

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