Interesting! I was wondering how those worked.
Given that there's no risk of over-lifting any of the "levers", and no false gates, it looks like it should be a pretty easy pick: looks like you could tension the lever pack by slipping something in next to the shackle on the right-hand side, and then just lift every lever until in binding order until it opens.
It looks like the levers are all raised the same distance -- and it's just the location of the "peak" on the lever that determines the key biting -- so an appropriately-sized half-diamond or S-rake could probably make quick work of it.
Neat. Thanks for sacrificing one as a cut-away... looking forward to playing with mine when it arrives.