Yes. You have a piece of British sterling silver. The lady's head is the monarch, Queen Victoria. That mark was used from 1838 to 1890. The lion stands for sterling. The "G" is most likely the date mark. The 3 towers are the town assay mark. Two towns used towers in their marks. Newcastle has an arranges them in an upsidedown triangle (2 on top, 1 on the bottom). All the towers look the same. Exeter also uses towers, but they look different. There is a tall tower in the center with two flanking smaller towers. You will have to determine which town you marks match, then you can go to the date mark charts on a site like 925/1000.com, and try to match up your "G" with the ones on the town date chart to find out what date it was made.
There should also be some other initials somewhere on the piece. Those would be the maker's initials. You can find them also on the website I mentioned. Good luck.