B&O pamphlet, date unclear. Look closely and you will see that it was an O scale, outside 3rd rail layout. I know very little about it, except for what is contained in the text. It reads..." This miniature system can be set up or taken down in eight hours. There are more than fifteen hundred electrical connections between the control box....and the track. Seventy four relays govern the signals and train control......."
It also boasts of "miniature reproductions of B&O Signals....."
Many things unique to the B&O are featured in 1/4 inch.
Look closely above, and you can see the 3rd rail.
From a time when railroads valued public perception.
C.J.
