Mike
Thanks for posting photos of your blob top beer bottle. We know from "Bottle Makers and Their Marks" that Rochester Glass Works was in business from 1865 to roughly 1887. It is not a manufacturer mark that one sees very often.
Your beer bottle has an applied blob lip. Hard to say on value since this must be a scarce one. Somehow your bottle has escaped the extensive catalog of soda and beer bottles at http://sodasandbeers.com That site has documented bottles from over 18,000 bottlers of the time period. One approach to get an idea of value is to look at what other similar blob top beers have sold for on eBay.... that is at least a starting point.