Johannes Antonius Vermolen . Aliases: Hans Vermolen ( 1913 - 1993 ) was a Dutch painter, watercolorist, and conservator (restorer). Johannes Antonius Vermolen s works have been auctioned off multiple times, with realized prices varying according to the size and medium of the artwork, for instance of 167.41 USD for Landschap met molen aan poldervaart in 2005