Carl F. Bucherer

Founded in 1888 in Lucerne (Switzerland) and owned by the Bucherer family since then. 

The company has been known for some interesting innovations.  Around 2005, the company developed and patented a special monopusher mechanism to show three times zones on one watch concurrently.   In was used in their Patravi TravelTec watch.

Ref: https://everywatchhasastory.com/collections/featured-watches/products/bucherer-18k-rose-gold-adamavi.

https://www.carl-f-bucherer.com/en/watches/patravi-traveltec-00-10620-03-33-01.

https://alchetron.com/Carl-F.-Bucherer.

http://coolluxurywatches.blogspot.com/2012/01/

All accessed 18 February 2020.