Around a year ago I was going through some boxes at a train store and I ended up finding a 1939 brass Varney Berkshire 2-8-4 steam locomotive which clearly hadn’t been run in years. I bought it and after testing it there were some signs that it might run again but it certainly wasn’t great. This time it didn’t move at all but after cleaning the contacts the motor started working again. The engine now runs amazing for something made 70 years ago