Ex an Acoustic Image Amp Head which has now become an “organ donor” to bring life back to other Acoustic Image equipment. These pots are working fine and the issues which caused the original equipment demise were not related to these pots.
Although from one model of the Acoustic Image Amp heads, (see the photograph), it is quite likely that these pots will suit their other models but make sure you have checked both the value and taper (A or B) you require.
Yes, I salvage EVERYTHING from my “sacrificial” audio equipment! Now you may wonder “what’s so special about these pots?” – it’s not the pots themselves but the physical construction that makes them difficult to find, those nice long support legs – quite similar to those often referred to as “spider pots” but with one leg missing!

ACOUSTIC IMAGE – Potentiometer
Ex Amp Head (Series 4)
Type: 50K Linear taper (B)
PCB mounting
Very long, wide terminal “legs” which also provide physical support for the pot when it is mounted on the main PCB
Supplied with the washer & nut to suit

Just in case you are not sure that this will suit other Acoustic Image gear, the physical details are:
Body diameter: 16.5mm
Shaft length: 9mm
Shaft style: D shape (round with flat spot) 6mm diameter
Leg length to the PCB: 20.5mm

COSMETIC CONDITION:
Absolutely no damage
Legs are straight and relatively clean of previous solder
Clean, dust free (actually sealed individually in a clear plastic packet)

TESTING:
Just to be sure, because it is used, I made some electrical tests and the track resistance is correct and carefully running the wiper around the track showed smooth consistent variation in resistance.