via this auction
"Keyboard contacts are a bit erratic, some keys work fine and others don't make proper contact so the tuning is a wobbly! The sample and hold feature looks to be not running as the pitch should be random in this setting but it's not
Other than these issues on a quick test it looked like all the controls were working. OSC is ok as is wave shapes, filter working, AD and ADSR for filter and amplifier working. LFO working"