I had to use a B&K vibration meter that was locked up inside a Samsonite briefcase. The case had a 3-digit thumbwheel & no one in the department knew the number. With a little fidgetting I found this lock had a glaring slip - a visible grove on the shaft (in the gap near each wheel) when you hit the right number, individually!
[IMG]http://i204.photobucket.com/albums/bb248/fcreeper/sam_1.jpg[/IMG
