A cheap & nasty bit of plastic that sat on top of my Commodore 64's computer keyboard.
I did manage to get the FM expansion pack for the C=64, it had a 5 octive non velocity keyboard.

My first MIDI keyboard - Akai AX73, and it's still going strong today.
Currently using a Roland D-50 for master keyboard duties.
_________________________
The Sonic Energy Authority - a sound investment