Iron Man, Vol. 1 #90 (1976)

When Calls the Controller
Realizing that it was the Controller behind the Blood Brothers' attacks, Iron Man starts to hunt him down. He manages to catch up with the Controller, who is raiding electronic parts warehouses to build more control disks, and contain him before he can amass more power. Unbeknownst to Iron Man, one of the Controller's unenslaved lackeys has begun production on new control disks, with plans to distribute them shortly.
Release Date: 1976