You’re looking at here a custom made on request 2 metre UK moulded 3 pin plug to an IEC C9 connector. The IEC C9 is used to power older machines such as:
Roland Juno Synthesisers (including the 106)
Revox Tape Machines
Singer Sewing Machines
The IEC C9 rewireable connector is not completely rewireable, this uses a punchdown connector and once assembled isn’t easy to undo. IEC C9 has a maximum working temperature of 70°C and is rated at 6amps. If you’re unsure on any of the above or if you would like free technical help please get in touch.