Seifituba

You are walking in the evening with friends on the street when one of you notices the reclusive safe maker leaving his home and forgetting to lock the door. You decide to seize the opportunity and go explore the home of the mysterious, wealthy recluse while he is away… You enter the room and look around. As befits a safe maker, there are several safes in the room. Suddenly, the door falls shut behind you and attempts to reopen it prove fruitless. The door is locked tight. One of you ends up with just a doorknob after yanking it hard. Probably the only chance is to find an emergency exit. Considering that he is a fanatical safe maker, it is reasonable to assume that the key for the emergency exit is inside one of the numerous safes in the room. Can you crack the safe and find the spare key before the owner returns home in an hour?