You mean the double-exposed footage, or 476? I trashed the double-exposed stuff, as it was not useable or even viewable for that matter. I bet if I look through all the Rio Grande material, there is some of 476, but I could not swear by that. Personally, I did not start shooting movies until 1969. My folks went to the D&RGW in 1967, and shot some material, but I haven't seen any films. My brother used dad's camera when we went out in 68(That footage coupled with Ernie Robarts footage is in "Last Steam Freights 1968". In 67 my brother shot slides of a couple of freights on Cumbres Pass, but I think my dad had retired his camera by then. I have never seen any films from that trip. My dad and I went out in 1969, and shot some stuff around Durango, but I don't have any movies. I have some slides, including Alamosa before the sale to the C&TS, but generally not scanned after 1968. Now if you are looking for 1949 and 1950 material I just completed editing on "Riding the Rio Grande", which will likely be released next fall(2022).
Greg