Hey I was wondering if there is anyway for a server owner/admin to open up the safes in 1.12.2

the 1.12 saves are most likely deleted

 And what does that have to do with anything? (/Genuine) 

 You could try to see the contents with /gamemode spectator, but you wont be able to get items out of it

 Nope didn't work

If you use this command you can add yourself to the safe, you will need to swap my uuid and username for your own obviously. /blockdata -554 4 613 {AllowedUsers:[{uuid:"f54da43a-eedc-43cc-bccd-3337334e9a66",username:"torchwood_one"}]}