BBE wroteI would pull the plug and verify that the keys aren’t the right height. Then if they aren’t convert a Safe Deposit key to work.
BBE.
I believe those took the old Ilco 1248S which was .335″ wide x .050″ thick, unfortunately long obsolete; try Ilco 1221L flat steel which is the same width & thickness.
Pete Schifferli
[unknown]