After a long time searching I finally found one of my dreambikes..... A Klein Attitude in teamcolours.... Lovely...
aah, the marktplaats cruiser...
it very much looks like a 1990, from the first batch they have made. is the Klein logo embossed on the upper rubber head set seal like on this one? that was only done on the early 1990 models.
also indicative for an early 1990 one is the location of the Klein logo on the fork a bit closer to the outside of the legs. the later ones in 1990 and 1991 had them straight on the front.
nice find, especially if you got it for his asking price.
the frame originally had a welded-on seat post clamp. i bet that it cracked and then was cut-off and replaced by the seperate clamp. that was a usual fix and nothing wrong with it.
and yeah, put the MC1 back on it