The long forearm ending in a schnabel coupled with the distinctive checkering patterns will be an eye-grabber for me in future. Any further ID features would be useful to confirm the gun's origin should I stumble on to one.

I guessed Ross King because I know he worked with Pachmayr at one point. Having a dim memory of an old photo of the two of them at a workbench which could be similar to the one shown above, coupled with my obviously faulty memory of someone having already guessed Pachmayr fueled my supposition. A re-check of earlier posts on this thread showed me my error. I'm now thinking Pachmayr, from the European influence present in these early sporters. My deductions may be lousy, but deducing I am!