All About Pocket Knives

I got this knife at an auction this weekend and I'm having a little trouble finding any info on it. It has pattern #1139 stamped on the other side. I've never seen a Case knife quite like this one. Does anyone know the value of this? I'm still new to collecting and still learning, so any info would be great. Thanks...

case 1139 - "bananna knife" for it's shape. pretty rough. original blade was a pruner style.

Johnnie nailed it on the head. used to be a pruner, pretty worn, "bannana" knife