[stumpstalker]

Nice find in my book.
Recognizing the beauty of the gun, as it has obviously not been coddled during it's long history, suggests you may be well on your way to a greater appreciation of Parker guns and their uses (as well as the Parker Gun Collectors Association).

As per the PARKER GUN Identification & Serialization book, by C. E. Price and S. P. Fjestad:


1) Your gun is of D3 quality code, which means a nice grade 3 gun (colloquially known as the "doctor’s grade"); and it has Damascus barrels

2) “hammerless” action type (no external hammers);

3) No extras were ordered for the factory to add to the gun.

4) Straight stock

5)12-gauge

6) 30-inch barrels, on which is indicated that the gun is #2-weight.

If you tell us where you are located someone will likely chime in and suggest a vintage gun-qualified smith for inspection; repair to barrels; and a stocker for repair of stock; or if so-inclined, a Parker-consistent replacement stock.

Restoration levels are always subject to debate, but making any antique that that you intend to use and display minimally respectable-looking, for me is the baseline.