Hi Michael,
Thanks for the photos. Indeed, I need longer bolts. I want to replace the original saddle and the replacement saddle is thicker. The threaded part of my original bolts seems to be approx. 12mm long. So, judging from your pictures, your bolts are longer. I guess 15-18mm or so should be fine. I tried to convert the diameter to inches, but is it 39/128 or 19/64 or..
I am from Munich, Germany btw.
Thanks
Stephan