If you feel adventurous, you might try opening it yourself. Think of it as a hobby. Years ago at the library of Congress, I read a book called, "The Art of Manipulation" by Clyde Lentz and Bill Kenton.. Recently, while surfing the web, I found a pdf file with the same information. The link is posted below.
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The book has been re-released. The link and copy are below.
(You don't have to buy it...the info is in the link above.)
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The Art of Safe Manipulation
Open Combination Locks Without Drilling, Burning, or Forcing! This is the real deal and not a watered down version. The Art of Manipulation was written for locksmiths and safe professionals in order to improve their technique and knowledge of opening and servicing safes. This manual will familiarize you with why manipulation is possible and how it is accomplished.
The Art of Manipulation illustrates the step-by-step procedures needed to manipulate lever type fence locks. Additionally, it explains the methods used in the rotary fence gear driven, rotary fence spring loaded, straight in tail piece, bottom drop, and off-set gear driven type locks.
Manipulation, also known as the "Hear, Feel, and See" method, was discovered and developed by a small group of safe experts. After much deliberation, two of these experts decided to pass on their information to other safe professionals and published this invaluable book.
Availability: Usually ships in 5-7 business days.
$212.00
Tom