Victor and Edison in the pre Diamond Disc era had a sort of entente cordial in that dealers often sold both lines. I remember reading a communication from the Victor Company to Edison on the eve of the Diamnond Disc to the effect that's things have been so great between us so far: don't mess it up by going disc....I was wondering about the tube & the Victor myself.
The tube being connected to an exterior horn makes sense to me.
I never thought about the posibility that the Victor was a trade-in. I thought it was either a new line to be sold in the shop as the disc machine would have been gaining popularity around the time this photo was taken, or I thought it might have been there to demonstrate the inferior sound quality of discs compared to cylinders :
Which I think was a nice way of saying " our legal department will be going over that A 250 with a fine tooth comb"

Jim