W-88-07-05, Mettmann 1988 28 x 33 cm 11.0 x 13.0 in.
W-88-02-02, Bad Salzuflen 1988 27 x 35 cm 10.6 x 13.8 in.
W-87-08-01, Locarno 1987 28 x 32 cm 11.0 x 12.6 in.
S-85-09-04, Erkrath 1985 32 x 28 cm 12.6 x 11.0 in.