Any "tells" for dateless SLQs?

@-jeffB is that a satisfactory result?

 

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(-jeffB digs around for that "thumbs-up" icon)

So, for @Kentucky, @Oldhoopster, and other chemists on the forum: what's going on here chemically? Is it an attack on the copper part of the coin, or are we really oxidizing silver to acetate with peroxide and acetic acid?

For the metallurgists: is this working the same way as acid-dating nickels? I can't see any other way that it could.

For everyone else: why aren't there a ton of acid-dated silver coins on the market, given that there are a ton of acid-dated nickels out there? This reagent is less hazardous than ferric chloride, although I imagine it's less shelf-stable.

Edit: I've seen one objection here (essentially, it should be easy to fake any date or any other detail via this process) -- but the same objection holds for acid-dated nickels, and even TPGs pass them as details coins.

 

Here we go again. This is my final reply to this subject. YES, back in the mid-to-late 1960s there was a liquid called simply 'Date Restorer For Silver Coins'. It was advertised in COINage magazine and sold by Danny Crabb. YES, I had it. YES, I used it. YES, it restored the dates on SLQs. The only problems were that it had a nasty acidic smell and turned the date area black over time. Also, if I remember correctly, the clear acid turned green while it was working on the coin. But why would someone want such a 'damaged' coin? Well, I was just beginning to collect coins back then. My father owned a bakery and I was allowed to look through the coins in the cash register and take what I wanted. That's right, I got the coins FOR FREE. What 12-year-old novice numismatist would turn that down to fill holes in his coin albums?
Pix below are some I posted here years ago on this topic. Dates were much more visible when the coins were freshly done.
So, please, all you nay-sayers who say this is pure fantasy, if you didn't see something, don't say it isn't so!
I bought it, I held it, I used it, it worked! 'Nuff said.

 

I would think the H2O2/acetic acid is attacking the copper