Chicago Cutlery P13 Folding 3- Blade Pocket Knife. Absolutely beautiful collectible pocket knife.  Not much can be found on these knives except the fact that they were high quality knives, some made in the USA and some made in Japan.

This link has pictures of the P16 and additional Chicago Cutlery Pocket Knife info.
http://www.allaboutpocketknives.com/knife_forum/viewtopic.php?f=2&t=16119