[R-390] Anyone know what this is, Probably NOT R-390A related!

[RLucch2098 at aol.com]

Hi All;
Can someone here either direct me to a site or knows what this device is used 
for or associated with.
It is made by Lionel, C-114-A, Coil, loading.
I know what the model is, hi, but would be nice to know what actual military 
unit it was used with.
Many WWW searches really found nothing.
Any help will be appreciated.
Pics:
http://www.myradioroom.com/lionel1.jpg
http://www.myradioroom.com/lionel2.jpg
http://www.myradioroom.com/lionel3.jpg
http://www.myradioroom.com/lionel4.jpg
Tnx & 73..
Rich WA2RQY