I noticed that the three Swift swing door ice bunker refrigerator cars in the Illinois Railway Museum's collection all have two hinges per door. Here are the cars:

http://www.irm.org/gallery/SRLX15030

http://www.irm.org/gallery/SRLX15802

http://www.irm.org/gallery/SRLX15833

Most refrigerator cars I have seen have three hinges with very few having only two. Was this something particular to one or two car builders or was this simply something specified by the owner?

Thanks.

Bob Chaparro

Hemet, CA