Some bear a monogram, but the engraving style and placement differs on each one, so I suppose it was a set that was commissioned or purchased over time.
Photographing the marks was very difficult. Here is a pic of the forks:
![Image](http://i692.photobucket.com/albums/vv290/phins420/forks1.jpg)
Some of the forks have a very clear AH in block capitals with serifs inside a rectangle, which leads me to believe they're by Johann Andreas Holbeling (1791-1898 Hamburg). There is no concession mark, but there is the number 13 in a rectangle.
Some of the forks have illegible 2 letter stamps that may or may not say AH as well, but they do not include a 13 mark, thet have some something inside a clearly cinquefoil shape like this:
![Image](http://i692.photobucket.com/albums/vv290/phins420/forks2.jpg)
The shape could conceivably be a profile, but it's too difficult to tell.
I hope I gave enough info here, and sorry I couldn't get clear pictures of the marks (I will try again though). Maybe the style and mixed composition of the forks can help dating these items.
I was originally researching these as Dutch, so I was happy to find the AH mark, but at this point I'm stumped by the combination of marks and the unusual design.
Thank you in advance for your help!