Here are a couple of pictures of the Finnish ring mentioned above. I call it that because it was found on the Karelia Peninsula. Also, when I posted it here previously, Gaspare reckoned it to be Finnish or German, and possibly prewar. I‘m posting it again because the maker mark is also 'RP'. Interesting...

img_3491.jpg (60.43 KB, 101 downloads)
img_3490.jpg (51.59 KB, 101 downloads)