So, i have followed this forum for a few years now and have found some of the discussions regarding how strong some safes really are, to be somewhat interesting. So yesterday i decided to join this forum and share some of the info i have collected over many years. The photo's i am posting show a John Tann Mark 6 Bankers Cash safe. If i remember correctly, it was removed from a supermarket somewhere in the UK which in itself was no easy feat considering it weighs around 4400lb. This burglary took place in the 1960's. Again, i believe the burglars spent at least 2, possibly 3 days trying to penetrate the safe, and considering the size of the pneumatic drill there were probably at least 3 people involved. In the UK and Europe this safe is rated as a grade 3. The ratings go up to a grade 7. I hope you find this of interest and welcome any comments you may have as to its construction etc.