Hi folks, I understood that someone is looking for Arist-O-Kratt harps. I have a harmonica instruction book over here out of 1976 or so called: "Mel Bay's Folk & Blues Harmonica", written by George Heaps-Nelson & Barbara McClintock Koehler. On page 15 there are two beautiful "vintage" photographs of the "Arist-O-Kratt" and "The Warbler". Both harps were made by William Kratt & Co. The address of this firm is on the harp box and reads: 988 Johnson Place, New Jersey. This could be an old address of course, since the book is from 1976 and the photographs could be even older. The book refers to the harps as "Best buys, they have plastic combs, good response and are the least expensive good harmonicas on the market"
Personally, I have never seen these harps over here in Holland so I can give you no other info.