looking for keen kutters

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I am usually a case man, although recently I have caught a bug for E.C. simmons "keenKutter" brand. I have this german made "Gobernador" soligen large teardrop jack. I really don't know much to it's history, but was told by a couple of members it could either be from the 50's or the 80's. I would probably lean towards the latter. Anyhow, I would like to trade it for a keenkutter (s) of similar value. If anyone is interested, just let me know. This knife is in very good cond. all the way around. Thanks, Tim