I have a 12.5" i-web which I believe would be a JD73-L but the glove is marked as a TJ1962-L which should be a 13.5" double post? Is this a known thing?
Most likely it's a prototype or a mock-up. When Vinci is designing a new model, they will get samples from the factory before finalizing the designs. At that point model #'s haven't been determined yet so they may have any old model # on them or even none at all.
What for you can't play IFThis ones been out there getting passed around for a year or 2. I want it if you ever sell lol.