Need information on Parker 12 gauge DH

[Chrisgray]

Hi there,

A friend of mine asked me to research his shotgun. He told me it was a parker and said it had belonged to his grandfather, long passed away.

I started researching Parkers and here is what I found out.

1.) The top of the barrel says the following:

"Parker Brothers Makers Meridien Connecticut Damascus Steel"

2.) The markings on the underside of the barrel indicate the following:

Frame Size= 2
Barrel Weight= 4-6 (superscript)
Serial #= 85657
Grade= 3 or D
Gauge = 12 (based on dropping a snap cap in the chamber)

I'm attaching a couple of photos of the shotgun, a closeup of the receiver, and the serial number.

Here are some specific questiosn which I have:

1.) Is this gun shootable with the correct ammuntion?

2.) If I need to have a gunsmith check it out in Southern California (LA area), can anyone recommend someone who could do that?

3.) Approximate value? My friend is not interested in selling it but I suggested that he look into getting insurance since it might be valuable.

Thanks for your help