I have an image of SFRD 10356, an Rr-46 with the old "backwards"
SFRD hatches, still in service. Also a 1969 image of SFRD 9040, an
Rr-43 with its original hatches - But this particular car carries a
recently applied "MDSE SERVICE RETURN TO AGENT SAN ANGELO TEXAS"
stencil. Merchandise service!
Other 1960's photos with the "normal" ice hatches are all from the
later Rr-5x classes.