Conserved Or Cleaned? Which Is It? (1893 Commemorative Columbian Half Dollar)

Thank you @hfjacinto. I read the posted link and found it interesting and informative.

To all who wanted to know how it was conserved, no acid dip was used. No abrasive cleaning was done. It was a simple soaking bath in boiling water and baking soda on aluminum foil for 10 min or so.

Yes, the markings closest to the relief edges still show the damage the tarnish did, etching into the silver but the soak method does not remove the silver as it's an electrolysis method which converts the oxide back to silver and deposits the rest onto the aluminum. It's a well known silver cleaning method used so as not to remove any silver and has no effect on the untarnished silver areas.

This method does not affect the surface of the coin as far as I have determined. I proved it to myself by taking a silver bullion round that has a proof like finish and soaking it in the same bath. I saw no loss of luster or surface damage.

I paid $26.80 for this coin on ebay with tax and shipping. As I said before, after the conservation, in hand, it looks a lustrous BU coin with luster and pronounced cartwheel.

I suggest trying for yourself with and inexpensive tarnished coin. Grab a soup bowl. line it with foil, boil a half cup water and dissolve a Tbsp. of baking soda in it. Pour it over the coin and let is sit 5 - 10 min. You'll be surprised. Now, I don't suggest doing it to a well worn circulated coin but a nicer coin showing mint luster, as I did, a bullion coin with tarnish that has no collector value just so you can see this has no affect on the clean silver surfaces.

Thank you all for your comments and guidance.