D&RGW Mile Per Hour Signs

In cleaning my garage I see the back of a sign we got in 1971. It is a 15 mph sign that is white or reflective letters(Not sure as I have not looked at the front in years) The background is black. It is sheet metal and was on a fence-post like stand(steel). We found it in either Dulce or Lumberton as we were driving the old ROW in June of 1971, right after the line was torn up. Since it was left there we felt it was worth unbolting. We had an open U-Haul trailer since we brought two motorcycles, so we had room for the sign. A couple of thoughts came through my mind. (1) Are there photos out there showing these types of MPH signs. (2) This sign was facing east toward Chama. Does anyone have a photo taken in either Lumberton or Dulce that might show where it was located. (3) Are any of these signs still in use on the C&TS or D&S? (4) What would be a good use for this sign today? Sorry too lazy to actually pull it out from behind something to post a photo at this time.
Greg Scholl
[www.gregschollvideo.com]