I purchased a set of knives back in 1986 at a yard sale. I know that they were manufactured by Frost Cutlery and are surgical steel blades. The knives themselves are only approx 3 1/2". There are 4 of them in a blue box. The image on the box is of a horse drawn carriage and a tree and the title "the Doctors". Each handle is made of a different material. On the blades it says "Little Doc" and has the picture of an eagle. They have a serial # 1329 just below the blade. I'm curious if anyone knows any other info on them. Like are they collector items? When they were manufactured? Or any other info on them. I know very little about knives, but I thought it would be something my son would like to have when he gets a little older. Of course, I would like to know if they should be well kept in the case for collecting purpose, or used by my son, which means they would be well worn out in no time. Thanks for any help!