Mattel Intellivision controller circuit portrait ix

Mattel brought out this behemoth in 1980, the very first generation of games consoles, competing with the the Atari VCS. Inside the huge brown and gold case are three separate circuitboards (one double-sided, two single), and each controller has a fairly neat flexi-board, printed onto acetate sheets and folded in half to create the contacts.

I struggle to believe these contacts in the controllers were very reliable.