ID MidCentury dining chairs and table  

Table that comes together with the chairs

Logo under the seating of the chair

another picture of the table, showing that it is not completely rectangular, but rectangular with a bit curved sides

I hope that @wesemael can at least tell us what  Wettig Gedeponeerd is. I tried to google it, but I can only find miniature buildings with  the name attached. 

Wettig gedeponeerd means Legally Registered.
The chairs have been bought in 1968, so the chairs must have been built at a company that was legally registered in The Netherlands in 1968 (or 1967)

Ah, okay, interesting. Could it also be that the paper label is something like an order form of the store where the furniture was sold?