A Toronto hotel, One King West, includes a former bank (Dominion Bank, 1914). One floor below the main level there is a large vault with a 4-foot-thick door:

Click image for larger version.  Name: meeting-vault-03.jpg  Views: 87  Size: 93.5 KB  ID: 5424

It is peculiar because the bolts can be seen but the boltwork is hidden (additionally there are only 20 bolts instead of the more common 24). The only other one I've seen like this is in the Federal Reserve Bank in Cleveland (which has 16 bolts) and is made by York. So, tentatively, the Toronto vault is probably a York?

I haven't run across any patents for this style of boltwork. Can anyone help?