{"product_id":"karel-martens-birthday-calendar","title":"Karel Martens - Birthday Calendar","description":"\u003cp\u003eThe layered and multi-hued patterns in this birthday calendar – made to hang on your wall – are based on a single geometrical composition punched out of colored cardstock in multiple directions. Originally conceived by Karel Martens in 1968, the design has remained unrealized until now.\u003c\/p\u003e\u003cp\u003e14 pages, 30 x 42 cm, hardcover, Roma Publications\u003cbr\u003e2026\u003c\/p\u003e\u003cp\u003eMade in Amsterdam\u003c\/p\u003e","brand":"Idea Books","offers":[{"title":"Default Title","offer_id":45922137899078,"sku":"0229639","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/8992\/6982\/files\/8fe6708b-9af1-4ad0-95d3-9758aed031c8.jpg?v=1784814169","url":"https:\/\/woodlandmod.com\/products\/karel-martens-birthday-calendar","provider":"Woodland Mod","version":"1.0","type":"link"}