Paul, one of our clubs longtime builders passed away several years ago, and I was able to purchase some of his plunder, including buttplate,and 2 trigg guards nearly identical to yours, maybe even the patchbox. I built an iron mtd rifle for another member with the parts, and used the remaining guard on my recent SMR. I remember the name was stamped on the plate and 1 guard . Our member probably gathered them up in the 90's. Thanks, swell looking SMR fo sho. Dave F
I also bought an identical buttplate from one of the guys on here from Montana.Both pieces of buttplate joined by a steel rivet before brazing,and as I recall,so was the one I used on the rifle I built. Now I know who made the parts. member made many trips to Friendship,and more as like that's where he got the parts, likely from Mr Carlson.
As I recall,that buttplate is a REAL BEAR to inlet,but sure looks good.
Now to find a suitable guard to go with buttplate-------it never ends til we do. hahaha Dave