I don't actually have these but I had put together a collage of ink blotters pictures from Railways Accessories Company showing their resistors, arresters and insulators I have a collection of. I haven't delved into the railroad signal box locks though because it's so hard to find the keys to these and I would like to have complete unit. I've seen ones on sites for sale with the keys or just the key alone and your talkin high prices so maybe someday. Take care to all.