Hi Teufelshund,
Thanks for your message, I’d be glad to try to help with a 56-E-1 key. The -1 is one of the few keys that I don’t have the actual cutting dimensions for, yet. However, I do have a pretty good, logical, idea as to how it should be cut, with only 2 different possibilities. If we don’t figure out the problem, then I could cut the 2 different keys and mail them to you for trial and error., no charges.
First off though, please try to explain what kind of problems you’re having with your key. Also, when looking through the lock’s top rectangular hasp opening, do you see the top steel edge of the lock bolt plate against the lock’s backplate and then 1 or 2 top brass edges of the lever tumbler(s)? I'd also like you to attach a picture of the lock's key number.
If you can include 3 or 4 pictures of your chest, I’ll try to help define who the chest maker was.
I hope this isn’t too confusing. Good luck……Ted