I love getting and seeing these old tickets! Ted Buttrey's old Fitzpatrick Museum's list of Numismatic Auction Catalogues and Fixed Price Lists includes this listing for a dealer in Düsseldorf named Kimpel operating in the 60s and early 70s. Your coin might well be from one of these lists. Perhaps the penciled in date is 9.22.67?
KIMPEL, W., Düsseldorf, Germany
Lists: {Small} have 1-43
1961: no 1, May; no 2, Dec;
1962: no 3, Apr; no 4, Nov;
1963: no 5, Mar; no 6, Jul; no 7, Oct;
1964: no 8, Jan; no 9, May; no 10, Sep;
1965: no 11, Mar; no 12, Aug/Sep; no 13;
1966: no 14, Mar/Apr; no 15, Summer; no 16, Oct/Nov;
1967: no 17, Feb/Mar; no 18, Jul; no 19, Sep; no 20, Dec;
1968: no 21, Mar; no 22, May/Jun; no 23, Aug; no 24, Dec;
1969: no 25, Mar; no 26, Jun; no 27, Sep; no 28, Dec;
1970: no 29, Mar/Apr; no 30, Jun/Jul; no 31, Oct; no 32, Dec;
1971: no 33, Mar; no 34, Jun/Jul; no 35, Sep; no 36, Dec;
1972: no 37, Mar; no 38, Jun; no 39, Sep; no 40, Dec;
1973: no 41, Apr; no 42, Sep
1974: no 43, Mar