Barcus Berry 1320 - Manual (Page 6)

Installation:
To install the Model 1320 transducer bridge,
shape and fit the bridge to the instrument in the
usual manner with the embedded-transducer side
of the bridge in the G-string position. Do not cut,
file or sand any portion of the bridge where the
transducer has been inserted, as this could
permanently damage the unit beyond repair.