I have a two pieces of German flatware of the same pattern. The spoon has the number "GEISLINGEN 84" and the fork has "GEISLINGEN 90". What does this mean? Is it silver content. I have looked at this website and many other trying to find definitions. If anyone can let me know and give research references this would be extremely helpful. Thanks.
Photos of spoon:
http://www.draketail.com/images/spoon84-1.jpg
http://www.draketail.com/images/spoon84-2.jpg
Photos of fork:
http://www.draketail.com/images/fork90-1.jpg
http://www.draketail.com/images/fork90-1.jpg