Help with Special Mint Sets

Hi you all. I need your help or opinion.
I recently purchased some 1966 SMS and after looking at them, I am kind of wondering . . . can the plastic holders be opened and coins removed or substituted, and then snapped back together? I have a couple of them where the quarter and half are really dull but the dime; nickel and penny are really shiny. It also appears the case has been opened.
Were they originally sealed by the mint or just snapped together?
I recently purchased some 1966 SMS and after looking at them, I am kind of wondering . . . can the plastic holders be opened and coins removed or substituted, and then snapped back together? I have a couple of them where the quarter and half are really dull but the dime; nickel and penny are really shiny. It also appears the case has been opened.
Were they originally sealed by the mint or just snapped together?
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Comments
it is made to open.
Scott
Toned Coins for sale @ tonedcointrader.com
and it sets us apart from practitioners and consultants. Gregor
Now, let me ask another question. Is there any sure fire way of telling a SMS half from a regular business strike? I was assuming they would be "proof like" but yet it appears there are SMS, SMS CAM and SMS DCAM coins. Any help will be greatly appreciated, as I am ready to contact the seller.
edited to add: I would saw "in general, but not always" a SMS coin will look better than the typical Business strike. Only because it has been in the holder, if it's the original coin. I've gotten some in '66 and '67 SMS sets that look beautiful, and others that look like circulated coins. all of the sellers insist they're not tampered with. Ya ...Right
<< <i>Is there any sure fire way of telling a SMS half from a regular business strike? >>
Ah, the age old question that has no answer. Does this look like an SMS or a business strike?
PCGS says SMS - and basically they'll say that about any coin that grades high, even when they're wrong.
Now, a coin like this is obviously SMS:
Russ, NCNE
very common yet. Five years ago it was most uncommon to see evidence of it. People
searching for high grades have removed many of the better sets rather than people
switching coins. You can still find gems and cameos but you'll have to look at more sets.