I'm trying to identify this hallmark. It is on a baby's christening ring. I believe it was manufactured in Germany between 1920 and 1940. https://lh6.googleusercontent.com/-el0noDi7Ozg/U0CQmTG8v1I/AAAAAAAAABw/S7cGHuez7Wk/w250-h154-no/N+ring+inside-crop2-color.jpg Thank you in advance.