Hi Michael.
I think you nailed it!! Obviously it is NOT a Tschinke rifle. The three Tschinke's I've held have stocks that are exactly like the ones in the photos you posted here (although not nearly in as good condition as the photos). Thanks for posting these.
Yes, the trigger and guard never looked right. And the "adjustable" trigger??
As you say, I'm sure this is a later made piece. Still, it will be interesting to see the additional photos. I'll let him know what he really owns. (It's OK. He is a nice guy
One thing this gun does show is how long the wheellock remained popular in Europen civilian hunting circles. Too bad it's an abstract. Thanks Michael. I'll post the additional photos when I receive them. I just remembered........there's a local gun show this weekend. I might see him there? Rick.