www.925-1000.com

Hello everybody,

I have this salt cellar, and this is the only mark, could someone help me please ?

Although unclear mark. To me it appears to be town mark Amsterdam, three Saint Andrew's crosses under crown with combined year letter used 18th to early 19th century, for 2nd standard silver or "kleine keur". Try to find the maker's mark. 
See Amsterdam:

viewtopic.php?f=5&t=32028#p80323
Peter.

Thanks Oel for you quick reply. I have good eyes and see everywhere, but there isn't any else marks...