1867-1967 Centennial PF Set

Hi Jayyk31. Nice set. That was the first set that was added to my collection around 43 years ago. I think I was 7 or 8 years old. I was collecting old coins from pocket change and I received that set as a birthday gift. The coins do get some very nice colour reflecting back from the PL finish. I've read that the medallion is sterling silver with a weight of 25 grams.
Mintage of this set is 72,463.
When the 2017 Commemorative Pure Silver 7-Coin Proof Set - 1967 Centennial Coins came out, it was a "must get" for me to go with the 1967 set.
http://goccf.com/t/291592&SearchTer...in,Proof,Set

By all means put them in airtites to preserve the toning.
I bought a set in '67.
20 years or so ago I looked and they were toned beautifully.
Took a look a couple of years ago and they were a greasy gray-black on the reverse.
Traded them in for melt value at a dealer for a more nicely toned set which I put in a ziploc with dessicant to hopefully slow the toning process.

If you want coins that approach proof quality buy the black box '67 set that came with the gold coin.
These are often available with the gold coin removed for near melt prices.
PCGS or NGC will even grade the coins from these sets as PF (proof), even though the mint did not have the equipment or expertise to strike proof coins until a few years later. Canadian TPGs will correctly grade those coins as SP (specimen)