I remember this derailleur as being introduced after the Ofmega Mistral, as part of the cheaper Ofmega Mundial groupset - although I have never seen it in a catalogue. It is a simplified version of the Mistral - regrettably available only in black.
This example has the, shorter, 42mm long parallelogram plates, a steel hanger bolt and outer pulley cage plate and a set up where the cable runs around a guide between the outer stop and the cable clamp. The outer pulley cage plate and the cable run are very reminiscent of Simplex designs. Ofmega worked closely with Simplex from 1987.
A brave but futile attempt to bring designer lunacy to the masses.