After collecting old knives for a while, you start to recognize the maker of the pocket knife just by looking at those bone handles. Some have distinctive jigging patterns while other times the color gives it away. Take the following quiz and test your knowledge on bone handled knives.
Additional information about bone handles:
Here is an excellent article about Rogers bone and Winterbottom bone by Bernard Levine.
A good resource for learning about the different Case XX bone handles.