Here are the official sites related to the 175th Anniversary of Swiss Railroads:

https://www.sbbhistoric....re-schweizer-bahnen.html

https://company.sbb.ch/d...re-schweizer-bahnen.html

https://news.sbb.ch/arti...5-jahre-schweizer-bahnen
PDF: https://news.sbb.ch/arti...weizer-bahnen?printpdf=1

https://175-jahre.ch

The 150th Anniversary Events (1997) featured a large number of special livery locomotives sponsored by participating companies.
I don't know if we will see a repeat again this year.

Major sponsors at that time like Hag, ADtranz (Bombardier) now Alstom may no longer be in a position to be as involved, but there are new players (Stadler) which have emerged.

The links to the sponsored Maerklin and Roco models can be found here: https://www.marklin-user...-Re-420-and-Class-Re-421
It does not appear that Hag is involved in the events at the present moment.

Regards

Mike C