need help.

Ive had this pocket knife for about 10 years. ive lost it and found it and lost it and found it again and again but its always made its way back to me. I love this knife and i really want to know the details about it;

how much it costs

the brand of it, etc etc

theres no visual brand name anywhere on the knife and i have no clue where i originally got it from any help is more than appreciated!