I got a spoon probably from Elberfeld but with a hallmark I can not find in Scheffler oder Clasen books.
There is a separately 12 lot mark and a makersmark or years letter C.
There was a maker Johann Anthon Coenen ca. 1753 ... 1766 (in Clasen with makersmark [IAC].
If C was a years letter, then it was from 1764.