Here is a $2 Bill my wife got me in 1976. It is Post Marked in 1976. And, a 1981 $10 Bill with SN 23456.
I've never been a fan of the post marked bills, but that $10 made me say, "Wow." out-loud. Nice find.
Me neither. But, I told my wife that it was awesome back then. She got it as a tip at her beauty salon. As you know, virtually everything I have was from circulation, even my bills. That 10 is nice but a little used.
BTW, do you collect US Paper Money? I have about 30 or 40 that I have acquired over the years. But, I don't keep them in any organized fashion.