Hey everyone, thanks for the quick replies and the warm hello! I'm happy to be here.
As I just discovered, my grandfather, rest his soul, was exploring Palestine and the Judean desert in the early 1930s (not the '40s). While in the desert, he stumbled upon these coins, along with an ancient pendant and apparently some other mystery items, all buried in a pile of rubble formed after a flood hit the area.
He handed over the pendant and the rest to the Brits, who then rewarded him with a permit to keep the coins upon his return to Switzerland.
Thinking about my grandpa's adventures in the desert is so cool! Hopefully, someone can help identify the other coins :)