Includes two interchangeable tips, on pointed and one rounded.
The Brush Developments Company was an early producer of sound recording equipment based in Ohio.
Brush Developments BL 301 Vibration Transducer Vintage Instrument
$185.0
Original/Reproduction
Original
Time Period Manufactured
Pre-1930
Maker
Brush Development Company - later part of Clevite
This is an instrument designed to connect to recording device or an amplifier to turn vibrations from a surface touched by the probe shown in the pictures into an audible and recordable signal.