According to Edith Reiter's 2014 book, this instrument was completed on 30 May 1925 and originally sold to a buyer in an unknown location.
Howe & Hurd (2004) describe heckelphone #3916 as a model 36b, tuned at A=440; it is reported by its present owner to have been converted to a semi-automatic octave mechanism and to have undergone some acoustical improvements.
As of 2020, this heckelphone owned by a professional musician in Minnesota, USA; it is reported to have been used in the Detroit Symphony. Its history remains largely unclear.