Frankfurt a. M., 5. März 1906. pages 126, items2584, 3 plates. Auction
of the coin collection of A. Kneist. Contains 325 Polish coins, among them 4 Danzig ducats of 1692 acquired by K. Sobanski (coin currently on display at the National Museum in Warsaw). Resulting list attached. Very rare. Quoted byM. Gumowski item 520 ,
E.E. Clain-Stefanelli pos. 9561, CNCE 2003.