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Locksmithing/Protectall safe question


I have a old Protectall safe serial number 510147. My question is after I turn the combination numbers as listed right 4 times, left 3 times, right again 2 times, last step is left to Stop. My safe does not show Stop on the dial. Have tried 0 thinking that would work but does not. Can you give me any pointers? Somehow it worked 20 some years ago when I acquired but just today tried again and get nothing and forget what I did back then.

Hi. Is this a Mosler Protectall or a Sisco?  Can you post a pic?

Mosler made a number of different safe locks. Some started to the left others to the right.

Try slowing down on the last turn around zero and see if you can feel a couple of "bumps"



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Dan Terrigno


I can answer questions about commercial locks, card access systems, locksmithing except for cars, safes & safe opening, video surveillance and master key systems


35 years as a locksmith, security system designer and installer, trouble shooting and repair of all manner of security related equipment

Associated Locksmiths of America, Safe & Vault Technicians Association

Attended Miami University, Kent State University, continuing education through the Associated Locksmiths of American

Awards and Honors
Certified Master Locksmith. Certified ALOA instructor.

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Numerous Fortune 500 companies, DOD, and other governmental agencies

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