The swiss website Zwischengas has an article on the newly opened Pantheon Exhibition which includes several Graber Alvis cars and 60 photos. There is a translate button with a union jack. See also 2014 Graber exhibition which we visited on our coach trip in March 2014.
We are proposing another coach trip in March 2020 to include the German Alvis exhibition. Leave a reply if you are interested in joining us.
Alvis Archive 
Hi John, More info please.
We will be in touch in December with more information. Thanks for your interest.