What is an imperial model 13 single shot rifle serial number 8886 worth?

I am unable to locate Imperial as a brand name OR as a trade name for rifles in any of my reference sources- it was used by 3 different makers of inexpensive handguns. If you can repost with a description and ALL markings on your rifle, will see if we can find any mention. Value is unlikely to be significant if not a mainstream gun maker.

The Imperial Fire Arms Manufacture in Philadelphia is the only other thing we know.