Have a look at the numbers at the end:
viewtopic.php?f=36&t=65928Or the numbers in the thread linked there.
If one of these lists did help, please let us know.
In the linked thread are also photos of a originally painted Victor. And many had success in removing later added layers of paint.
If that doesn't help, there is obviously the possibility to manipulate that lock, but discussion about this is not yet allowed in the public area of this forum.