Bergeon 5523-5 caseback opener

[Prinze20]

Hi all,

I wanted to get a new 29.5 caseback opener because my old Horotec slips from the wear.

Bought a fresh genuine? Bergeon 5523-5 diy and i won't fit any of my genuine casebacks.

At first i thouht i bought a smaller one but 29.50 is thé one to go...

 

[Prinze20]

It looks genuine and the price was genuine!

What the hell is wrong?

 

[Prinze20]

Tested on different genuine casebacks, 1680, 17000 and Tudor chrono casebacks