Tim O'Connor asked:
"did these cars have Duryea underframes? or just very curious looking
draft gear?"
http://www.ebay.com/itm/350867736566

 
Curious looking draft gear, but no Duryea underframe.  This car lacks the deep underframe crossmembers and unique brake component mounting of a Duryea cushion underframe.  The linked spreadsheet does NOT identify this series as being equipped with Duryea underframes:
http://www.steamerafreightcars.com/prototype/frtcars/1937aarpdfmain.html
 
 
Ben Hom