Ron,
So -thats- how you have been spending your time. Didn't know that "landscaping" was code-talk for "gunsmithing". Very nice piece it is, too--the 1900 toggle and the custom grips are very classy.
I guessed the 1906 breechblock before I read through to Ken's post, but he got there first...
Of course, what I need now are the frame and original receiver serial# (if you still have the barrel) for my database
--Dwight