SMS Set packaging question

I see flat packs.
I see Blue cardboard.
What is the history of the packaging?
Is any of it reseller material? Anything to look out for?
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1965 is the former, 1966 and 1967 is the latter. I wouldn't think it would be worth it to repackage, but perhaps these have gone up since last I looked.
Thanks!
With SMS's, I keep going deeper and deeper into the proofs, and was not sure if the different types of packaging was original mint packaging.
BST: KindaNewish (3/21/21), WQuarterFreddie (3/30/21), Meltdown (4/6/21), DBSTrader2 (5/5/21) AKA- unclemonkey on Blow Out