I
still occasionally come across five cent pieces from the 1940s and 1950s in my change. Not frequently, but at least every couple of months. Less commonly I
still find wheat cents from the 40s and 50s, though as a kid in the 1970s I would pull lots of them, often dating back to the 1910s, out of my parents' and grandparents' change. Buffalo nickels as well. Finding 50, 60, 70 year old coins that way is what got me started in
numismatics.
It doesn't surprise me that
denarii would have circulated for many decades, even for more than a century.