Not sure how that happened, but I was trying to post the fact that there are 1776-1976 S non proof silver clad quarters. Your picture is hard to see clearly so I don't know whether you have a proof or not.
Yes, I have that set and another is a blue square presentation and my separate quarter looks like the quarter in the two sets
Slight difference...need a good calibrated scale to be sure. Silver issue— Weight 5.75 grams; composition, outer layers of .800 silver, .200 copper bonded to inner core of .209 silver, .791 copper (net weight .0739 oz. pure silver). Copper-nickel issue— Weight 5.67 grams; composition, outer layers of .750 copper, .250 nickel bonded to inner core of pure copper. Yeoman, R.S.. A Guide Book of United States Coins 2015: The Official Red Book (Kindle Locations 2927-2929). Whitman Publishing. Kindle Edition.
My Red book shows that there is a 1976 S Copper-Nickel Clad, 1976 S Silver Clad (7,000,000) and another 1976 S Silver Clad (4,000,000) with * that many were melted in 1982
for those that don't have a Red Book this is a good, although limited info "redbook" online, scroll down to the Bicentennial Design (1976) and there's 2 1976 S ... a clad and a 40% silver https://www.usacoinbook.com/coins/quarters/washington/ click on the dates to see more info about that specific MM coin. A redbook has a lot of better info. Get one if you don't have one. You'll save yourself a lot of time and learn a lot too if you read through it from time to time.
Correct, I compared the rim to another quarter and then to my two known proofs. I am looking for a bicentennial S copper clad so I will have a better comparison.