That's one excellent haul! Interesting that they're all from the war years.
You would expect high volume to improve your odds (what grocery store did not get slammed this week?). I found two Rosies myself (1952 and 1964, both Philly). Not the best time to be picking up coins from the floor, but for silver I'll make an exception.
I would have dropped my roll of toilet paper right there. excellent!
Congrats on the great haul!
When the supermarkets are slammed, the employees are too busy working to check the coinstars.