Eindhoven is pretty close to Tilburg ... well, let me think, BC - there was the famous Tilburg music store Bill Coolen (now strictly an accordeon shop, I believe) where they let me play a very nice rosewood SC Signature in the backroom (priced at about DFL 8000 back then - you can barely get an Excel for that kind of money these days).
In any case, somebody did a lot of work to produce a monster, but it does look as if they had a set of proper Series electronics. If it is, then it's a very cheap set of Series I electronics at 500 euro. Verify that it's the proper stuff, buy this monster, and start saving up for a custom - you won't have to pay the premium for the electronics.