Goodness Gracious, What a beautiful rifle! My favorite of engraving on slightly faded color casehardening. Are there any engraver's marks?
Chuck

It's gorgeous, but most likely did not start out as a Pacific model, as the Pacific Ballard was a straight grip frame, and yours is a PG frame.
I love the fact it's got a Stevens rebarrel, as I think it adds to the uniqueness of the gun!

I think it might be a tough one to categorize in a particular model. If the lever doesn't match, then it most likely came from a Pacific or another DST model. Some other models like #2 and #4 used the Pacific style lever when special ordered with DST blocks.
The engraving looks very crisp, and a little deeper than what I've usually seen on Ballards, and I wonder if it was "touched up" during a restoration? It does look like the style I see, but I usually can see metal displacement where borders were stamped, and not engraved. All those little upside down heart shaped figures were a stamp the engraver used, and often done by an apprentice on the stamped part. Marlin used a combination of engraving and stamping borders, so when refinishing the engraving gets all cut, or if polished it loses the raised edges around the stamped portions.
There are several engraved PG models, plus the ability for a customer to add engraving to other PG models, so tough to say what it started out as.

Someone can correct me, but that engraving is different. It has had the background removed and lowered. A difficult and time consuming procedure. Background is normally just matted or beaded. There are engravers on the forum that could explain it better, but excellent engraving that deep is rare.
Chuck