1930s biplane with W shape wing?

Hi all, spotted this on eBay- not interested in buying it and I’m not selling it- what’s driving me potty is the shape is ringing bells- can anyone identify the type of machines- Eastern European? It’s dated 1937
https://www.ebay.co.uk/itm/antique-art-deco-1934-aliminum-persepex-plane-aeoroplane-bi-plane-j310/192708341319?hash=item2cde4fee47%3Ag%3AYxMAAOSwWB5b1fti&LH_Auction=1

ATB TT