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One dark brown plastic, 2 piece, 3 vacuum tube two piece body aid, clip on back, microphone grill nine horizontal lines on upper front, "Z" on bottom front, one dial on top, two switches on top. Used for bone conduction. Retailed for $50.

One dark brown plastic, 2 piece, 3 vacuum tube two piece body aid, clip on back, microphone grill nine horizontal lines on upper front, "Z" on bottom front, one dial on top, two switches on top. Used for bone conduction. Retailed for $50.

Beige plastic body aid with microphone design of 4 sets of 4 lines forming circular pattern within a central control switch that allows the user to monitor the intake of sound. Battery door opens from the front bottom. Slider is on side with silver clip on back and one cord/receiver. Box included.

Personal amplifier with numerous parts within a blue box. Includes instruction sheet for use.

Beige plastic body aid with all-leather lower part for battery. Silver clip on back, on/off switch on back, one cord and ear receiver. Microphone grille on front with 6 horizontal lines. Original box (black with green velvet interior) with warranty information and vacolite fitting chart.

One black bakelite body aid with separate battery, microphone and receiver components. Microphone grill is dots in circular shape. Original case with battery.

Dark brown plastic body aid with 2 vacuum tubes, 2 piece unit, battery cable, earphone cable, and earphone receiver. Microphone grill on front, volume control on top, with "Z" noted on front center. Includes original black box.

Dark brown plastic body aid with 2 vacuum tubes, 2 piece unit, battery cable, earphone cable, and earphone receiver. Microphone grill on front, volume control on top, with "Z" noted on front center. Includes original green box and pristine copy of instruction booklet.

Dark brown plastic body aid with 2 vacuum tubes, 2 piece unit, battery cable, earphone cable, and earphone receiver. Microphone grill on front, volume control on top, with "Z" noted on front center. Includes original green box.

Silver metal unit with red plastic casing and gold filigree clip on front covering microphone grill, 3 vacuum tubes, one piece body aid, and volume and on/off switches.

Stainless steel one-piece 3 vacuum tube body aid, with green insert running vertically down the front, gold clip with 'S', two square microphone openings hidden by gold clip in middle upper front, 4 grooved lines running vertically aside the green insert volume control knob on top in green, on/off switch on top, and battery door swings out from side.

Stainless steel one-piece 3 vacuum tube body aid, with green insert running vertically down the front, gold clip with 'S', two square microphone openings hidden by gold clip in middle upper front, 4 grooved lines running vertically aside the green insert volume control knob on top in green, on/off switch on top, and battery door swings out from side. Headphone ear reciever included.

Silver metal with burgundy plastic insert, 3 transistor tubes, "M" in gold metal microphone grill, two clips on front, one dial on top, one switch on top, battery door swings out from bottom half on back side.

One gold metal, one-piece, 3 vacuum tube body aid with horizontal etched design on left front side with 3 leaves that form microphone opening, one on/off dial on top, one switch on top, battery case swings sideways.

One gold metal, one-piece, 3 vacuum tube body aid with horizontal etched design on left front side with 3 leaves that form microphone opening, one on/off dial on top, one switch on top, battery case swings sideways. Ear reciever and cord included.