Dear Smakkk
Theoderichs excellent page on German marks provides answers.
Here the link to the site:
http://silberpunze.freehost.ag/index.php
And here the link to the page with the answers:
http://silberpunze.freehost.ag/index.php?id=7&sw=
So your item is made in Berlin, around 1860. The maker is "N", unfortunately not listed (yet). It is silver, at least 12 lot, (75% silver)
Kind regards
Jörg