Crossed Keys Mark within Shield | 18k Gold Ring

by shauna
(bradenton)

Hello!
I have this fascinating ring that has two marks. The inside mark is a slab that has a gold smudge on top from an old repair so you can't read it all. It has a copyright symbol with a 1 next to it and then smudge. Under that is what looks like the letters UG or IG and then more smudge. The second mark is on the outside of the band. It appears to me to be a set of crossed keys within a sheild with a helmet above. It has been tested as 18k by a jeweler. He suggested that perhaps it is a European mark? But I haven't found anything like it in my research. Any ideas?