You’re right, Martha. The picture is not terribly useful. Much better when I look at it on my computer. The marks have been attributed to the 1870s, but the hinge mechanism was used mostly in the 1700s. I’ll just go with “antique.” Close enough for government work!

This site does not enlarge pics and yours are too small to read !! Look and see if there is a date letter and just look up British date letters on silver !!