Extremely rare Wooden Lock sequential movement puzzle

designed by Louis Coolen and Richard Hensel
crafted by Richard Hensel
condition: rough craftsmanship but no visible damage, unsolved
description: the goal is to remove the shackle through a series of sequential movements, however I have not succeeded finding even the first move. It's a really difficult puzzle.
additional info: a cool story about the lock and some spoiler images can be found on Allard Walker's puzzle blog

The puzzle will be shipped from Budapest, Hungary. Shipping costs will be calculated after bidding for the puzzle has ended. Won puzzles may be combined for shipping upon request. The preferred payment is Paypal but bank transfer is also possible.