Horn trumpet types

[RonJ]

My 47 Special Deluxe has two horn trumpets in front of the radiator with the HRL 4101 relay mounted in between them.

I understand the longer one on the left is for a low bass tone and the other shorter one on the right is for the treble tone.  Recognizing that there may be other physical differences for the tones, note in the photo the covers are different.  It is odd that the one horn has a screw termination on the side and the other has the wire go through to the inside.  
Is this the way they came from the factory or was one horn changed at some point in the last 75 years?

 

 

Edited February 13, 2023 by RonJ
Words missing

[Sniper]

FWIW, both the horns on my 51 have the screw connection.

[Dan Hiebert]

The one with the screw connection on the outside and screw securing the cap at the apex is the original style.  

[RonJ]

Thanks.
The search begins if only because a matched pair will look better. 

[joecoozie]

Sent you a PM