Aspencade antenna ID

[mike in idaho]

Sorting through various boxes, piecing my GL1100 basketcase together, I see I have two different styles of antenna mounts:

Is one of these a CB antenna and the other one for AM&FM? Or is one just an older version of the other?
Also, where do you buy the masts that screw onto these mounts?

 

[dan filipi]

I believe they should be matched to the top set.

Omega Man has a pair of the stock could tell us.

OMan, you copy? :help:

 

[slabghost]

My guess would be the larger base is CB and the smaller am/fm. Masts should be available at most parts stores, truck stops, or car stereo places.