According to Edith Reiter's 2014 book, this instrument was completed on 18 January 1927 and originally sold to a buyer in the USA.
Howe & Hurd (2004) describe heckelphone #4008 as a model 36i, tuned at A=440;
As of 2004, heckelphone #4008 has been reported to be located in San Francisco (CA), USA, owned by Grant Green. Previously, it belonged to the Interlochen Arts Academy in Interlochen (MI).
The earlier history of heckelphone #4008 remains largely unclear.