There have been a few topics asking for help from Elektronauts in identifying a specific device before (Help me identify synth please, Help me to identify this Synth Drum Machine [resolved]), but here’s a generic thread to bring such requests together in one place to aid easy searching.
Here’s my first request, as seen some time before 1999 (it’s sat on a Yamaha QX21 and next to a Roland SH-1) - thanks in advance for the help! :