Found this interesting article online - an interview with the daughter of Julian & Sybil Larrouy. The article says the name of the bar was JS Valley Bar for Julian and Sybil, or J.S.V. Bar.
https://carsonvalleytimes.wordpress.com/2015/04/17/main-street-stories-the-pyrenees-janes-beauty-salon-growing-up-above-the-valley-bar/
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(but no help 
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The hunt never ends...