According to the brewers themselves, this is their "Orval clone", presented for the first time at Zythos Beer Festival 2014 (name: "Orval clone", first time bottled in the fall of 2014. [references: http://www.streekproductencentrum.be/pagina20.html https://untappd.com/b/huisbrouwerij-den-herberg-cuvee-deville/809510 ]