A colorful figure in the dutrch art scene was Mulder certainly. He was not the greatest artists but his works are well worth to look at and sometimes they changed theur surroundings dramatically. At one time he changed the apprarance of the MUZIEKTHEATER in Amsterdam ( catalogue available at www.ftn-books.com).
Mulder was an artist who’s works were not collected frequantly by dutch museums and his works are almost not found in company collections). It is not sold at galeries, but for those who admire Mulder, i noticed recently some interest at auction, so my guess is his works will come up for auction in the near future more frequently.