According to Edith Reiter's 2014 book this instrument was completed on 9 March 2011; it is a model 36 voll cons.
As of January 2022, heckelphone #5022 is located in Berlin, Germany. It belongs to, and is played by, the Berliner Philharmoniker, who acquired it directly from Wilhelm Heckel GmbH.
A video in which heckelphone #5022 can be seen and heard, played by Christoph Hartman from the Berliner Philharmoniker, can be found here.