This knife was my grandmother's. I recently acquired it from my sister. I don't know how old it is, but it is old. It is shaped like an old fashioned lady's shoe. It is about 1 3/4 inches closed and about 3 1/4 inches open. My parents thought that my grandmother might have gotten it at the 1904 World's Fair in St. Louis. Can anyone tell me anything about it? Should I use Flitz and clean the blade or leave it as is?