Thank you Doug for your reply.
I don't say it yet but last sunday evening was lucky: I found my chain on the road without his connecting link and the belgian team goes 1/8 football final.
The sizes of my chain are pitch 1/2", inside 0,205" and diametre 0,305".
So it's seems to be a mix of 415 and 110044
Do you know where to find connecting link for 1/2" x 3/16" chain with ref. 415 or 110044.
Kind regard.