Stump Jumper: i have seen some of his calls advertized on E-Bay going for as much as $65.00. Don't know if whoever was selling them ever got thier price or not. One of my cousin's and a friend of his used Black Duck calls quite a bit, and a matter of fact, they entered the National duck calling contest in Studgart Ark. about 25 or 30 years ago and came in 2nd using these calls. Ed Mehok used a lot of exotic woods in his calls. There is no telling how many survived, and which ones may turn up. He made duck, goose, predator, and even had some 45rpm records recored with his calls. Hope this gives you a little history of these calls.
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Bill