Sold as spare or repairs.
Avo Allwave Oscillator Integrated Into Custom Box With Handle.
Vintage military oscillator unit type 231 wooden transit Case Box WW11
BT British Telecom Seawood PT250 Oscillator 174A 1980s Vintage New 
Vintage Moulded Bakelite AVO Test Bridge Rare Collectable Retro With Handle
Avo TT169 Transistor Tester Vintage Equipment - SP124
Lan-Trainer ~ RF Oscillator ~ Tuneable ~ Teaching board ~ Untested
