Sorry for the late reply, I was out of the city.
ETS. J. VERSTERREN
Tell us that the furniture was manufacturer in Belgium, a center European country, by the company MEUBELEN MEUBELEN ETS. J. VERSTERREN. The metal parts of a furniture can tell us a lot of information regarding when it was manufacturer. Without the manufacturer label or mark, we cannot date who was the manufacturer or where. However, with the pictures provided I can date the furniture as being manufacturer in the 1900-1950 period. This is because all the screws are modern, they were manufacturer using machining process, and not hand forged or even cast.
Regarding the value of your item, I have just perform a market research of similar sold items as yours. I performed the research based upon the most recent finished auctions and private sells, so the value given is the real market value of your item. This is the only way to know the exact value of your unit.
The value will be in the range of 400-600$.
Please, use the stars to rate my answer or let me know if I can help you any further!