PL Set Envelope Differences

Hello,

In the picture attached, the left column has uncirculated sets for '71, '73, and '84. I think these envelopes are authentic. Can someone confirm the ones in the right column, for '77 and '79, are reprints in lieu of having the original available?

I'm a new collector interested in uncirculated CAD and USD govt issued sets and varieties of those sets. The coins themselves are sufficiently nostalgic, I'm more interested in the original plastic and accompanying card. For varieties that cost hundreds of dollars, should I make sure I'm getting the original envelope? Just because I (may have) paid hundreds now doesn't mean it will stay that way, especially if everything isn't original.

95+% of these coins won't apply, but someday when my son goes to sell the more expensive ones off...hopefully well into the future...I want him to get the best return.

Thanks in advance.