My tone arm should work, there are only two that I am aware of, the earlier ones are like on your drawing in your last post on the right.
Those were in the Victor I, II and III machines for sure and from then on, on the Victor IV machines, it is like on the left tonearm.
That was their new design and had the longer taper tonearm.
Here are some better photo's of the tone arm.
Please note that it has some dents on the underside and the set screw mount has been re-soldered at some point.
It looks like it's 8 inches on that measurement, but it's less then that, but a little longer then 7-¾ inches.
I don't have the elbow you need, I was just trying to figure out which one you were trying to get.
The one on the left is a sample that is not for sale and the one on the right is a repro that I had, and I sent that one back to the eBay seller in Peru.
Sorry about the confusion on the elbows, however there are still a few reproes left in cast aluminum.
If you don't want my tone arm, Victor made the machine in the video adapted from the Victor VI out side horn machine.
Dimensionally is is the same, but you will have to find someone with a lathe to mount it on an out side horn machine.
Those tome arms in the video for the VTLA are more plentiful on eBay.
However they will be gold plated, so you will have to have it done in nickel.
Also, if you have the tone arm and it's only missing the goose neck, there's lots on eBay that will work, you just have to know how to solder _ a jig would be required and it may need nickel plating once the soldering job is done.
If you're still not sure about my tonearm, you may try it, and if it doesn't work, you may send it back, but I'm pretty sure it will work.
https://www.ebay.com/itm/284226584475?h ... SwLqRcmfUi
https://www.youtube.com/watch?v=SBHnFL_1KSg