to the category a):

She splits herself again in sub-groups - models which have also got a special paint job beside the promotion and the models which there were also in this colour as promotion-free models, but carry a logo or a stroke. Thus the models with the black Sparkassen-logo were given away, for example, by the Sparkassen to the little boys, if these brought their piggy bank to the bank on the world savings day to deposit the contents on their passbook.

This versions are to be found rather often and there probably is almost no model of the row, which not also with this logo are exists. The only exceptions are the late models which have issued only in 1976 or at least to some more expensive ones, how the Magirus trucks or the Mercedes coach O303. Same is also valid for promotion models of other banks (e.g. Volksbank), only these models are not to be found so often.

to the category b):

Also here there are again sub-groups - which the cardboxes in which then an promotion-free model stands, the plastic boxes, which a logo or a stroke carry (mostly as a wet sliding picture, like on the models, on the box stuck) and the special inlays in these boxes - as an example are called here the ARAL models.

There was this probably only till 1971 (also compares list of the ARAL models). Because the models in the boxes can easily exchange, here it is not real understandably whether the combination is so really real. Thus were sighted, e.g., already Porsche Carrera in boxes which have an Aral inlay (model from 1976!!!). Same is valid, by the way, also for the cardboxes - however, but here are to me only VW and Audi models known. And these were probably expelled even about VW or Audi trader or as a present given, if daddy there a car has bought.

to the category c):

moreover, for example, VW Transporters in the versions count of my knowledge Miele, pipe cleaning service or Sparkasse, as well as also the Ford Transit truck Sparkasse or the Porsche 911S racing version "Dahl Kanal" to call only the most important ones. The model, as well as the inlay are marked here accordingly and sometimes the models have a different paint job to the series.

unusual colour version, however, without promotion?

here presumably it concerns surplus production or just colour pattern, if the paint job is really original. Thus would be able for example, company XY to Schuco have given the order: "We need for promotion purposes 500* VW Transporters in that and that colour" - As a result Schuco has varnished 550* bodys in the desired colour and after the high-class control 540* bodys are fine, therefore the order could be also delivered to the company XY.

And remaining 40* models? Then they became quite easy normally about the toy trader sells because little boys it made no difference which colour had the toys car. This versions are rare of course today accordingly.

* the numbers are only examples and have no relation to the reality