Aircraft Parts Manufacturer and "SkyBox" freight cars.

[ATSFDash9]

Hm, the only one looking similar which I can find flipping through my records, is these one:
http://www.railcarphotos.com/PhotoDetail...toID=46628
a liitle bit out of your number-range, so maybe you're right.
But there are also these nearly similar ones:
http://www.railcarphotos.com/PhotoDetail...otoID=3080
http://www.rrpicturearchives.net/showPic...?id=413561
http://www.rrpicturearchives.net/showPic...id=3006492
http://www.rrpicturearchives.net/showPic...id=1655414
http://www.rrpicturearchives.net/showPic...id=1753551
http://www.rrpicturearchives.net/showPic...id=2956519

Regards,
Frank