Squelch,
I give you credit. With some wiggling and re-alignment, the change can insert all the way now.
So I'll mount the lock onto the safe and change the combo (wish me luck).
The change key is from a Mosler safe, so perhaps their change key matches the S&G?
I can't imagine Mosler would use S&G locks, but they could have copied the S&G locks so closely that they use identical change keys.
Joe