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Locksmithing/Mosler CD 120 Group II


I have an old Mosler CD 120 Group II lock on an older Mosler safe.  The lock has tumblers that you can manually change the combination.  Unfortunately it is only sporadically working so I'm afraid to lock it anymore.  I just had a locksmith out to fix it but she told me the tumblers are too worn.  She also told me that they did not make a lock the same size that would fit so I was out of luck.  I find it hard to believe that nobody makes a replacement lock.  So I'm out the $ for the service call and still can not use the lock.  Is there anyplace I can buy a replacement lock or anyplace I can get parts to fix?


Mosler has been out of business for 12 years and parts are no longer available except for used locks.   I believe that I may have the back cover and wheel pack for a CD 120, but I know I do not have the whole lock.

Your locksmith is correct in that this lock had a unique foot print, with no aftermarket locks made for replacements.

You have a couple choices - you can simply remove the lock and use the container for storage without locking it, you can try the wheel pack that I have, or you can keep looking to see if you can find a lock in somebodies parts room in a safe company or locksmith shop.

My recommendation would be to retire this safe and use it as a display or non-locking storage container, then get a new current production model.

As far as the used parts or locks go,   They are generally sold "as-is", with no implied warranty and no return policy.   With a limited, obsolete lock population to choose from, you could easily be looking for quite a while to find the correct item, or you could simply stumble upon someone's hoard of them!

Last option would be to upgrade the safe (if you plan on still using it), installing a new digital/electronic lock.   Obviously some modifications, including drilling and tapping mounting holes, may be required to make it operational, but digital locks are NOT going to require the alignment problems created by the CD-120's unique mounting foot print.

I would need to see the door to be in a position to make a better estimate, evaluation, or suggestions concerning any upgrades.


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Terry V. Andreasen (Andy)


Safe and Vault related Questions; Antique Safe Repair and Restoration; With over 42 years in the Safe & Vault industry, if I can't answer your question I know where to get the answer. Current Project: Restoration of an Ely Norris Cannonball Safe from the early 1900's. Will answer Safe & Vault related questions concerning age, value, restoration, moving, opening & repairing, parts, operation and history. Note: It is not my intention to teach you to open safes or to provide information which may aid in the unlawful opening of a safe. I will not give out drill points or information which I deem inappropriate.


44 years in the Safe & Vault Industry. Owner and Service Manager for one of the largest Safe & Vault companies on the West Coast. Graduate of Lockmasters Safe Lock Servicing, Safe lock Manipulation and Safe Deposit Lock Courses. Graduate of Locksmith Institute. Certified Instructor for the California Locksmith Association teaching Basic and Advanced Lock Servicing, Basic Safe opening and Repairing. Factory Trained by AMSEC, LORD Safes, LeFebure, Mosler, KabaMas, LaGard and Sargent & Greenleaf Author of "The Coffee Table Guide to Antique Safes".

SafeCrackers International and the National Antique Safe Association Safe & Vault Technicians Association (SAVTA)

The Coffee Table Guide to Antique Safes

Graduate of Locksmith Institute 1972 Graduate Lockmasters Safe Lock Servicing 1974 Graduate Lockmasters Safe Lock Manipulation 1975 Graduate Lockmasters Safe Deposit Lock Servicing 1985 Instructor Certified - California Locksmith Association - 1985 Factory trained by AMSEC, MAJOR, STAR, Johnson-Pacific, Kaba-MAS, Allied-Gary, ISM, Lord, Brown Safe, EXL, Mosler, Diebold.

Awards and Honors
2009 - 2015 - Listed in AllExperts Top 50 Experts. All Expert Categories - Safes & Security Containers, Locksmithing, Antique Safes. Retired US Army Chief Warrant Officer (CW4), with 39 years of total service. With numerous awards from Vietnam, Desert Storm and Operation Iraqi Freedom. US Navy - 1971-1981 US Army Reserve 1984-2013 US Army Retired

Past/Present Clients
US Secret Service, FBI, BATF, Local Law enforcment agencies, Diebold, Hamilton Pacific, Red Hawk Int., Chubb International, Bank of America, Wells Fargo Bank, Mechanics Bank, El Dorado Savings Bank, many Credit unions and smaller banks. McDonalds, Togos, BurgerKing, TacoBell, Carls Jr. FoodMaxx, SaveMart, Lucky's, Albertson's, Raley's, Safeway, NobHill, Bell Markets, PW Markets. Great America, Century Theatres, Cinemark Theatres, UA Cinemas, and many homeowners and small businesses. Provide warranty service for lock and safe manufactures. Service Area is Northern California (Fresno to Oregon and Western Nevada)

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