The 323 is a very cool machete!
The middle machete, with the red handles in this picture is a vintage, 1940's/ 1950's era Collins 323- I would imagine that it qualifies as "one of the old ones". Minus the custom handle, of course. Andy Roy (Fiddleback Forge) gave mine the special treatment.
Here's the thread about the project:
Gottahaveit, I'd be interested in hearing about your Collins when it arrives! Specifically, whether or not it has the same "as forged" surface, and the sweet taper. Sweet find! There aren't many of those bad boys out there.
:edit: And yes, I would be interested in hearing where you found yours!