Ladies EFSO watch (60's?)

This is a Swiss EFZO ladies gold watch. It says EFZO at the top
on the face of the watch but I cannot make out what it says at the bottom.
This watch belonged to my beloved mother who passed away in 1982 and
I do not plan on selling it. I tried to find some info about this watch by googling but only found 2 other EFZO watches on ebay but not like this one. I also read that EFZO is/was a Swiss watch company. If anyone has any more info on this watch, especially the year it was manufactured, please email me at linybuggy@aol.com

Thanks,
Jane

More pics here:
http://digitalgirl1961.webs.com/jewelry/watches/efzo/efzo.html