This is a vintage Meccano Power Control Unit, Type A2. It is a unit type model used for controlling speed.
VINTAGE MECCANO POWER CONTROL UNIT A2 - MODEL TRAIN SUPPLY ENGLAND
Meccano Power Control Unit A3. Untested.
Vintage Meccano Power Control Unit A3 In Original Box Great Condition
Vintage Meccano Power Control Unit A3 With Box & Leaflets – Working
Vintage Meccano Power Control Unit A3 complete original box and paperwork? 1958
Vintage 1950's - Meccano Power Control Unit A3 - Leaflet
