My name is John Peters. I am a restorer and collector of watches by Bader SA of Holderbank, Switzerland.
The Mentor brand of watches is the most common of the brands used by Bader Ltd, Bader SA, Bader & Hafner, of Holderbank, Switzerland. Bader registered the Mentor trademark with the underlined Art Deco style logo on the 10th January 1962. However they registered the brand name MENTOR on the 11th July 1941.
These were a range of 'everyday' watches. They were not a "luxury" brand but had a large number of designs and styles for men and women. Many of them were pin lever movements that were not designed to be dismantled when serviced. They were what you might consider to be throw-away watches but maybe after many years of life.
Bader had other brands they had registered such as:
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 11th July 1941. The Logo for Mentor was registered 10th January 1962.
MENTORA
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 29th September 1946 - I have yet to come across one of this brand.
MENTORES
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 29th September 1946 - I have yet to come across one of this brand.
JBRICO
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 14th October 1955 - I have yet to come across one of this brand.
MANDAN
Registered by Bader SA, 14th October 1955 - I have yet to come across one of this brand.
PIETRO
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 1st July 1957 - I have yet to come across one of this brand.
HOLBAG
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 5th July 1957 - I have yet to come across one of this brand.
STORY
Registered by Bader SA, 5th July 1957 - I have a STORY pocket watch in pieces awaiting restoration.
HOLDEXO
Registered by Bader & Hafner SA / Bader SA / Mentor Watches, 19th February 1958 - I have yet to come across one of this brand.
FIT
Registered by Bader & Hafner SA / Bader SA /Mentor Watches 16th November 1963 - I have yet to come across one of this brand.
THALBA
Registered by Bader SA, 9th December 1969 - I have yet to come across one of this brand.
BRAVO
Registered by Bader & Hafner, 13th August 1973 - I have yet to come across one of this brand.
TORPEDO
Registered by Bader AG/Fabr Mentor, 28th October 1974 - I have yet to come across one of this brand.
RHOMBA
Registered by Bader SA / Bader & Hafner SA, Holderbank, Switzerland. 5th July 1957. I have a few of these in the collection..