This machine is a large and heavy one!
It is the same as a HP-9820, the difference being the tape instead of the magnetic card reader. It seems to be a very rare calculator.
There is a fair amount of documentation on the 982x machines, if interested please contact me.
This machine comes with three extension cartridges installed: Peripheral Control I 11220A, Mathematics 11221A and User Definable Functions I – III 11222A.
For details or questions please contact me