New Member with Hammer Gun and Questions

[mcaden]

Hello,

We inherited a beautiful Parker Bros. side hammer shotgun from my father-in-law. We recently found it in one of his old Navy boxes (nailed shut) and it probably hasn't seen the light of day in over 70 years. He passed away over 10 years ago, so unfortunately we can't ask him about it... since we would love to know more about it and its history.

I have a given it a very light cleaning and oiling just to protect it. It was definitely well used at some point long ago and it has a nice patina. We just want to preserve it and keep it as original as possible.

Here is what I know -
Serial nos. all match #32458
Size 2 marked
Barrel weight marked as 4 lbs
Twisted Barrel
Year of manufacture: circa 1883?
Gauge: 10 or 12?

Questions:
1. It is missing the left side hammer and screw. Does anybody know someone on the forum who I might be able to purchase these parts? I would really like to make this shotgun whole again.

2. I would appreciate your observations and input - we have no intention of selling it because its a family heirloom. If any additional pictures would help let me know. What grade gun is this? G grade? What gauge? What year of manufacture? Does the serial no reveal any info? Etc.

Many thanks for all of your input.

-Marc