Best bet for it is to reline the barrel to .22 rimfire, or better, fit a new barrel, fit a matching extractor, and take it out shooting.
Keep it away from the High-Vel ammo. Standard speed is the ticket. The action is not real strong, and relies on the strength of the mostly unsupported cross screw at the front of the breech block, to hold the round in place. The screw bends a fair bit. I've seen several that were good for a ruptured case each time it was fired.
They are too new to be Antique status, ammo is too expensive to shoot it a lot, in the original caliber. Guys have butchered .22 Hornet brass into a CF case that they could load to modest levels. Always the risk with that of someone trying to get modern performance out of it...grenade in action, literally.
The "serial" number was to keep the parts together as they travelled through the plant. As far as anyone has been able to tell, they do not mean anything, and no records were kept, beyond bare production qty's. They recycled the numbers. Chances are good there are two or three others around with the same number, that have survived.
If you are good with basic info, look at the Frank DeHaas "Single Shot Rifles" series of books. The books by Grant go into a bit more detail of the variants and rough timelines for the different variant models.
Cheers
Trev