There was a competition in Spain called NexoFil among stamps issued in the world in 2018. International jury chose best stamps in 10 categories. The second best in the category of the Most Innovative Stamp was Estonian flag, which had its second print issued in 2018.
Read more about the competition and award ceremony: NEXOFIL Prizes to the Best Stamps of the World: Norway, winner, Ukraine 2nd, France 3rd
Three best innovative stamps in the world 2018:
All results: 2019- Winners NEXOFIL Awards
Congratulations to Eesti Postmark and Indrek Ilves, the designer of the awarded stamp!
About this stamp in filateelia foorum.