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The most difficult part was getting that thick-@$$ (Deutsch...stark und überbaut) silver off of it.
That said, I have a two-horse 240V (geared down to just under) 3000 rpm buffer here, and two side-by-side 8" spiral-sewn buffing wheels defined it as (at least) possible. Thankfully, I took the time (when we moved out here) to install an exhaust fan right in from of that particular machine.

BEFORE I tore the silver off it, I DID notice that it was heavy, but I just attributed that to (WRONG) "back in the early 1960's, Miraphone used thicker sheet metal".

I did just notice a difference...
Not only is the interior seam on the old one very rough (as were the early outer curve seams),
but the styling of the way they cut the ends of the bow cap was different.

ALSO...
That's a bunch of tarnish for not very many days after being buffed...
I wasn't thinking about the fact that I was (protection from denting) putting foam rubber (containing sulfur compounds) right next to raw brass.
Even worse, it's OLD foam rubber (as old foam rubber begins to break down).
(dumb)

THAT SAID...
Maybe it's an easy way (if a customer has to schedule a repair pickup months off in the future) to speed up the repatination a repaired raw brass area...(??)