I acquired this repro cylinder plate, made of cast aluminum, 6.75" wide. The seller knew only that it came from a relative who worked in the Roanoke steam shop (as had his father and grandfather). It's obviously not original, as it doesn't have mounting holes, and the originals didn't have the road number - and what does "CJHA" stand for? The repro J plates I've read about don't have those. I haven't been able to find anything about this, so I'm hoping one of you will know what I have. Whatever it is, I'm glad to have it!
I have never seen one of these and I have no idea why someone would have made it with the number and letters. It certainly wouldn't fool anyone with a little knowledge of N&W practices.
That's my thinking - that it was made not as an exact replica, but for some commemorative reason. Perhaps a retirement gift? He retired in the mid 80s, and the seller said he was on at least one of the early 611 excursions.