This controller is in full working order. I have been using this controller to test all locomotives and so is in full working order.
Vintage Hammant & Morgan Duette Twin Supply Power Unit - Boxed with Leads - H&M
vintage Hammant & Morgan Duette twin-track model railway power controller (P23)
Hammant & Morgan Duette Twin Power Supply DC 0-12V & 12V and 16V AC - working
Hammant & Morgan Duette Transformer Controller
Hammant & Morgan Duette Twin Power Supply DC 0-12V & 12V and 16V AC - tested
Hammant & Morgan Duette Twin Supply Power Unit working