According to Edith Reiter's 2014 book this instrument was completed on 1 October 2003 and originally sold to a buyer in the USA.
Howe & Hurd (2004) describe heckelphone #5011 as a model 36 voll cons, with a novel design for the key cluster for the left little finger.
As of 2004, heckelphone #5011 was reported to be located in Atlanta (GA), USA, owned by the Timothy Chance, who likely acquired it directly from Heckel.