Only 4 games were released for the rare Italian Reel RE-EL Giochi TV-10 Videogiochi a Cassette System a Pong related Game System - like for example the Soundic Sd-050, 070 & 090 systems. Thanks to Marco Pasquali for this picture of his collection.
he tells us:
Only 4 carts have been released in total for this system of the same family of PC-50x systems.
I found these informations contacting some years ago the company who produced and sold these systems in Italy.
This company produced also a cheaper version of the system with games in black and white , the B/W system has different colors, black with green dnd orange keys.
The games are different and not compatible between B/W and Color versions