size 23 x 17 cm, in very good condition, distributed at the IAA in Frankfurt in Sept. 1993
size 17 x 12 cm, in good condition, distributed at the IAA in Frankfurt in Sept. 1997
size 18 x 12,5 cm, in good condition
size 24 x 19 cm, in very good condition, undated, probably introduction year (1969)
