I’m not sure how you’d recognized that from the room (as opposed to historical records), unless someone left a cot or some personal effects there. How was the one in the church identified?
Curiosity killed the cat. Satisfaction brought him back…and all that.
There’s no way I could stand not to know. 
Personally, I’d want to see what was in it, but it wouldn’t drive me nuts.
I’d probably want to have it opened up before I moved in in the first place, though—I’d balance the possibility of finding cash or treasure for the keeping against the chance of finding out, several years in the future, that there’d been a mummified head sitting inside it for years, with what looked like teeth marks inside the door.
Seems this poll is pretty on sided and my customer is a member of an extreme minority.
I’m back there a few days next week. We’ve decided we need to move the safe a few feet for the new pressure tank. Even just working around it I’m tempted to bring a stethoscope over.
I guess the world will never know what’s in it. Maybe the next owner will be more curious.
Stethoscope will more than likely be useless, unless the safe is extremely old, and probably even then. Even in the hands of a professional, the sound is so subtle and faint that even if you know what you’re listening for it’s either useless or you’ll be doing it for hours and hours on end, if not days. Pros use a drill, hand tools, and fiber optic (or some other type of optical) scope. It can still take hours.
No! Then the smart zombies come!
Wanted to post a link to this
Open it!
I would have to know.