Fun/useful example of old style safe players might encounter

[tetrasodium]

I originally came across this from an Ad, but the walkthrough of multi(hidden) lock & multi key functionality example of a safe witgwith potentially trapped non-keyed elements once the locks themselves are handled made it into something that could theoretically exist in most d&d/PF/etc settings,

 

[Jd Smith1]

I don't trap the strong box in fantasy or Old West settings; I trap the key.

 

[GMMichael]

Pretty awesome when he seems to run out of breath about one minute into the video...

Anyway, this is a great D&D/dwarf/gnome safe (elves would just use magic). It would be fun to show PCs a picture of the front and ask them what to do with the keys (provided they had found the keys).

 

[Dannyalcatraz]

There’s several posters on Imgur who post videos of opening antique safes and vaults. You might want to search there for inspiration.