Found the publication wherein the variety Helvetica is mentioned HERE.
They also mention Alp King, Swissmix (heterogeneous mix of something), and Walliser Queen. BTW it's been published in 1999 (field trials started around 1995), is in German language, and the work has been funded/done by the the Eidgenössische Forschungsanstalt für Pflanzenbau now part of Agroscope.
There hasn't been any real Swiss variety since the WWII and except for France, no hemp at all in Europe during the '60 and '70 (according to another, related publication HERE). Additionally, there's not one Swiss hemp variety found in any seedbank.
Your last link i get to see this
Dear Visitor
The federal authorities of Switzerland make use of a system scanning website requests for security violations. Your request has been flagged as such a violation and has therefore been blocked. It is possible that this constitutes a false positive. If you have received this message in error, please contact the service desk of the Federal Office for IT and Telecommunications, stating support-id C-12896349251832986669 as well as any additional information which may be relevant to the case. We will evaluate your case and report back to you within a week.
Federal Office of IT and Telecommunications