Why would my Grandfather hold on to this Morgan Dollar?

It may. I'm no expert like we have on this board.

In the past when I've polished stuff it was steel, aluminum, brass/copper, nickel, silver, gold, etc but mostly jewelry / watches / musical instruments. But the more expensive the object and softer the metal, the lighter the method of buffing (from machine to hand) & lighter buffing compound was used/done; and the more meticulous one works.

Also over time those methods would change/improve; for example: adding hydrosonic cleanings, etc. to remove debris without harming the surface that any method of polishing could cause if debris was even "brushed" off.

Coins and the "cleaning" methods are fascinating by comparison as no harm can be done to the surface.

I've learned a lot from ppl on this board though but I'm very careful in which coins I may "clean" and I fiddle with example coins to clean from time to time to gain more insight/experience. But I do it so infrequently I have to remember what I forgot.

 

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