Hallmarks

I have added a photograph of a piece of silver I have and I wonder if anyone can can give me any information about it. Above the guitar are 3 marks a lion facing the wrong way, next a mark I cannot make out, next an N with a crown above it. On the top of the barrel there are 2 marks one is H.H the second is 830.
Jamesfile:///C:/Users/jim/Pictures/2013 03 12/IMGP2679.JPG

I hope this works.
James
IMGP2679.JPG

The lion is Netherlands 1853 to 1953 Item is made for export.
The minerva mark is used from 1814 and is still in use
The crowned N is year mark and it is from 1948
830 is the silver purity 83% a very common standard.
The HH is maker and its Herbert Hooijkaas from Schoonhoven active 1943 to 1980

Very informative many thanks.
James