VaultDoors wroteFrom these 1KW videos, it appears all the boxes have been removed from the (upper) Safe Deposit Vault and the only ones remaining are in the Coupon Room. I have not been able to find any pics of the (lower) Treasury Vault.
Update - The Dominion Bank Building, Toronto article published in Construction magazine, 1914 has the most complete history of the One King West Hotel and Vaults discovered to date. The article details the construction of the building, vaults, and vault doors and confirms the vault doors and vault walls were electrically protected. The walls are described as being fire proof, drill proof, shock proof, water proof, and acid proof, and the doors are described as being ‘steam tight’.
Here is the One King West rectangular Treasury Vault located in the sub-basement which has a combo viewer or ‘illuminated dial-case’:


Here is a pic of the Safe Deposit Vault located in the basement with lowered vault door and entrance platforms, glass panel, and all time lock movements sans the long actuator bar and flag:

Here is a pic of the interior of the Safe Deposit Vault which had over 1,000 safe deposit boxes:

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