Sure looks like gold. Don't you have a gold tester? If not, get one and learn how to use it. They are not infallible but most of the time pretty reliable. BTW, here in Southern California we find a lot of Mexican "gold" stamped 10k and 14k, and looking really good, that is not gold at all - it's brass or some other copper alloy. The markings in your ring are manufacturers hallmarks and an expert could tell you who made the ring from those marks (I'm no expert).
On the subject of gold testers, though, I have found enough jewelry to become a semi-professional restorer of jewelry - you'll need some small tools, files and various metal brushes, a good diamond tester (I recommend you get one that is a combination moissanite/diamond tester 'cuz moissanite will fool the regular diamond tester), a small refractometer, a chatham filter, a good ring sizer and rounding tool (to fix those smashed flat by feet and lawnmowers), etc. We don't find many old coins here but we do find lots and lots of clad and jewelry. Most of the jewelry is junk, of course, but every now and then you get a keeper. One of my buddies kept track of his finds a couple of years ago - in 2007 he found 77 gold rings. I didn't find nearly that many, but 2 or 3 a month is not unusual, especially if you hunt the beaches. As for clad - most people tend to dismiss finding nickels, dimes, and quarters as a waste of their time, but my wife and I together manage to put $200 - $300 in the bank every month from modern clad finds. That, of course, brings up another must-have tool, a good rock tumbler to clean those disgusting clad coins with.
Gil