NP 1937 AAR rebuild dates
I am working on a few N scale 1937 AAR boxcars (Intermountain), to be finished
in the NP series 15000-17996. My modeling era is 1960.
Did NP rebuild all of these '37 boxcars by 1960, or were there some left in the
original config? I searched the message archive but didn't find any details
about which cars were rebuilt and when.