Hi Jorg,
I hope you do not mind that I write in english. The shoe is either 43 or 42.5. It has insert to make it smaller.
We can agree that you pay me and if they do not fit you send them back to me and I will send you back the money. You will only need to cover the shipping cost. But I think that if you have 42 and 2/3 they will fit you.
Please let me know.
Best,
Milan