Thanks Much,
Except for the lower number of stake pockets, the prototype photo that George sent me looks very much like one of the available S scale flat cars (Rex diecast);
http://www.nasg.org/Gallery/reports/scale/cars/manuf_rr/indexRex_EngineeringFlat_Car.php

I added this to my list of prototypes that closely match an S scale model.
I am interested in news of any other news of 42' or 46' fishbelly flatcars.  
TNX
--
Ted Larson
trainweb.org/mhrr/        --------        NASG.org        --------        https://www.nasg.org/Clubs/RegionsMinnesota.php
GN in 1965