Trapdoor for bank tellers

I'm aware of quite a few inventions designed to trap or incapacitate bank robbers. But the idea of allowing a bank teller to abruptly vanish is more novel.

Of course, this approach could only work if there was a single teller working, and hopefully no other customers in the bank.

I was curious whether this bank with the cashier trapdoor might still exist, but I had no luck finding its address. I did find that it was acquired by another bank in 1948. So it was probably demolished long ago.

Hagerstown Morning Herald - Aug 9, 1932