Sentry Floor Safe
Customer brought in their Sentry floor safe door. They wanted the combination for it, as it was currently locked opened.
The cover on the back is locked on, due to the locking bolts that pass through it. A little surprised by the fact I had to manipulate the safe open to change the combination. It was pretty easy to figure out as it only has 2 combination wheels and a drive cam. The National Guide to Manipulation has a chapter on it, and how to open it. Chapter 6, page 81. Funnest part of my day