I love lever locks, especially my ERA sash lock... so hard to pick, i find it just a bit harder then a legge yellow.
Any ideas what lock we are dealing with here VICIUS, btw is your caps stuck or something?
Generally the modest 2 wires will get the basic lever locks open, and sometimes the good old curtain locks.
Basically you are creating 2 L shapped wires, the tensioner L's are just a bit taller than the lever pick.
You search for the talon, which is on the bolt, and depending on which way the lock is situated is pulled back the correct way to apply tension on the levers.
Here are some simple diagrams that COULD help you..
Then you lift the levers from back to front, then maybe it will open!
There are better picking descriptions ..but for that you will have to search.
Skold