[Milsurplus] Is this a BC-611 or what ?

[Hubert Miller]

Someone tell me what this is about. Doesn't look like any BC-611 I have ever seen.
Epay item
http://www.ebay.com/itm/WWII-Army-Radio-Signal-Corps-NOS-SRC-536-BC-611-BG-197-Tuning-Equiment-IE-37/253188657014?_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D413


or by title " WWII Army Radio Signal Corps NOS SRC-536 BC-611 BG-197 Tuning Equiment IE-37  "   2 available, 2 sold, BIN $295.
I do not recognize it.
-Hue