Hi Ed,
Yes Sure, history and provenance is what its all about
but isnt the frame a new stock replacement and the cases standard a10?
Not sure what you mean ??
Replacement frames were unnumbered,
Its a fairly difficult job to recreate the number stamped on the gusset plate without it being fairly obvious
With RGS models its the frame thats unique to them
Yes you engine casings re stamped all the time, some good and some bad,
supporting evidence is always needed
John