The JFK coins are beautifully designed coins, and it depicts a well-loved US President. It is so popular here in the US. So glad to see that you have a proof. I see that the mint mark is S for the San Francisco mint. That is indeed 40%, the other 1976 are clad (I think... not too sure now). I love it you are taking to liking coins, my sweet stacking sis! The base of my stack are silver and gold coins. The rest are part of my collection! I am so, so very proud of your growth in stacking dear @saffisara!!!!
Have a lovelyly evening (here, I think you must be sleeping now... I just arrived from work) and luv ya always, my sweet. Take care 🥰🌺🤙 and lots of hugs 🤗🤗!tip