Well, about 10 seconds of searching on the net got this Buler history article ...http://www.buler.ch/en/brand/history.html
I had seen this brand around on eBay searches here in the Philippines where I am, but I never found one I wanted & didn't bother to learn about them for that reason.
That article did present something interesting about the company:
1. it is newer than I thought it was ... founded 1945
2. for the 1957 entry, we find this statement "At that time watch-manufacturers produced mechanical watches. Buler watches offered a real alternative to those of its competitors in the same price range, and the company soon became one of the leading mass producers of pin-lever-watches."
BUT ... after 1960, this statement is found "Indeed, at the advent of quartz watches, which replaced the mechanical watches, Buler started to build up their image as a streamlined brand in the middle and upper price range. This was an essential step on which Buler built its present worldwide reputation." Indicates the company really repositioned itself from real low-end stuff to "better quality" product as time went on...
The history article goes up to about 1990 with entries, BUT: Other search results indicate the brand is still around today!