Prime 1990 was held in Tillburg, Holland by Vision, Aces and Active. About 400 people attended. Over 15 demos were delivered for the demo competition, but only 5 were shown. Prices were modest; an extra drive for first price, 50 disks for second, a joystick (!) for third. There was a giant bigscreen for the competition.
Mentioned in the news section of Fourth Dimension 3 as an upcoming party, under the name Vision/Aces/Active Party and with a date of august 11th, indicating it was postponed from this original plan.