Hi, I am new to Watchuseek and new to the world of vintage watches. Does anybody know anything about the watch companies Zetus, Gumar, and Burgana? Any help would be appreciated.
Here are some pics of the watches in question.

Gumar:
Name:  CYMERA_20150905_124554.jpg
Views: 108
Size:  289.8 KBName:  CYMERA_20150905_124617.jpg
Views: 94
Size:  477.1 KB

Zetus:
Name:  CYMERA_20150905_124749.jpg
Views: 85
Size:  325.5 KBName:  CYMERA_20150905_130013.jpg
Views: 90
Size:  547.4 KB

Burgana:
Name:  CYMERA_20150815_205742.jpg
Views: 91
Size:  391.0 KB