New Parker :)

[Mark]

I just purchased a Parker 12 gauge, serial 191029. On the flat part of the barrels is PH with a smaller HT over an A. There is also a 3 with a superscript 12. On the center lug is a 12 with a dot above the 12 and a 1 1/2 below the 12. The other side has a 4. The barrel rib says Parker Special Steel. It has the serial number stamped on the water table with a 2 underneath. It has an english stock which appears to have been cut since the LOP to the butt plate is 13 7/8" and the butt plate and screws are not correct. The chokes seem to measure Full/Full. I paid $600. My questions are:

1) What do I have?
2) Is it worth restoring?
3) What should the restoration consist of?
4) Is it worth $600?
5) Would changing the chokes hurt the value?

Mark