Since then, Mörck has had more than 600 engravings issued as postage stamps, primarily engraved for the postal services of the Nordic countries, but also for the postal services of France, Monaco, Canada and others.
Siden da har Mörck fået udgivet cirka 600 gravurer på frimærker, primært graveret for de nordiske landes postvæsener, men også for blandt andet Frankrig, Monaco og Canada.