Not much is known about Jen
other than they were an Italian organ manufacturer dating back to
the early 70s.
It would appear that Jen were principally manufacturers
of unremarkable electronic organs for the 'domestic' market. However,
they also had a stab at electronic pianos and, I seem to recall
(but cannot verify), a string synthesiser.
I am not entirely sure but I also believe that at one
time they also made electronic organs under contract for Vox including
the famous 'Jaguar' model.
Later in their history, Jen attempted to enter the synth
market with the SX1000 and SX2000 monosynths and the Synx 508 polysynth.
Sadly, none of these products made much of an impression in a market
dominated by more established names in the field.