New Member In Virginia

[BrianLiszkay]

Nice to meet everyone and be apart of this organization. Thank You for having me. Here is my main question: What is the best way to get this Parker open to get to the identifying marks?

I just got it back from a gunsmith and he soaked it in oil for a couple weeks, ran it in a electrolysis tank for a few days, and then cleaned it up as best he could without damaging. At the beginning you could barely even see any of the engraving work. Now we can see a hunting scene on all 3 sides. It seems too small for 12g and too big for 20g. It probably lost some thickness over the 80+ years in the dirt so still thinking it is a 12g. We think it is a grade 3. Any insight/suggestions would be greatly appreciated. We do not think the hinge pin will budge and even if drilled out he doesn't think it will allow it to be opened. Thank You!