That looks like a set of fabuland "saddle bags" to me, IMHO. They were used with some of the motorscooter/motorbike things (25 years ago, 1-May-00, to lugnet.cad.dat.parts)
Thank you, Jonathan! With your information, I could narrow the search, and found two hits: Set 3781 Maximillian Mouse Set 3782 Photojournalist / Patrick Parrot (...) (25 years ago, 1-May-00, to lugnet.cad.dat.parts)
