An interesting subject in collecting vintage watches for me has always been those so called "dead" watch brands that made chronographs pre-1970's.

Once the quartz crisis took hold, only a few managed to actually survive, and the majority of those were bought by the Swatch Group or other large conglomerates. 

The rest, all gone (unless their names alone have been revived for some marketing reason).

Names like Nicolet, Gigadnet, Wakmann, Cyma, Gallet, Zodiac, etc. There were literally hundreds of these brand names that popup up pre-1970s. Some were owned by bigger brands, for example, Wakmann, which belongs to Breitling. This brand was used to assemble watches in the USA to avoid certain taxes when the watches entered assembled.