Michael.
In Robert E. Sloan book A CENTURY + TEN of D&RGW NARROW GAUGE FREIGHT CARS 1870 TO 1981. On page 181,caboose 0580 is listed as sold 1-52, Del Norte. What that means, good question. The only photo I have at this time in NARROW GAUGE PICTORIAL Volume V Cabooses of the D&RGW by Grandt.On page 98 # 0580 Alamosa ,August 1940 in the in the pre RIO GRANDE lellering.
Soooo photo in 1940,cabosse off the road in 1952,I would think you could letter 0580 in the RIO GRANDE lettering and not have to many people jumping up and down.
Bill Scobie.