Director Hallandsen's Diamond

You are a notorious gang of thieves, infamous and feared, known to both the police and the public. Once again, you are on a theft spree, and this time it concerns the legendary and highly valued diamond from Director Hallandsen's office. It is extremely rare, and you can put your thieving career on the shelf with this last heist. You have been planning the diamond heist for a long time, all the plans are perfectly clear, the preparations are in place – now you just have to carry out the heist. Your countless observations have shown that Director Hallandsen takes a lunch break for exactly 60 minutes at the same time every day, and today is the day when all your skills will be put to the test. You have to find and steal the diamond before Director Hallandsen returns from his lunch break. If you fail, it will result in a long stay in the State Prison in Vridsløselille. Good luck.