According to Edith Reiter's 2014 book this instrument was completed on 27 December 1984 and originally sold to a buyer in the UK.
Howe & Hurd (2004) describe heckelphone #4986 as a model 36 voll cons.
As of 2004, heckelphone #4986 was reported to be located in Melbourne, Australia, owned by and used in the Melbourne Symphony Orchestra.
Further details on the history of heckelphone #4986 remain unclear.