Hevyg - Modular Component Systems, a private label sold by Jacques Pennier (or JC Penney in less snobby parts of the country than Scottsdale, AZ)! You can send the Grand Prize check to me here.
I was wondering if anyone was going to mention them. I admit to owning an MCS system as my first "real" stereo. I worked at Penney's in college, so I got an employee discount on it back in 1978. The speakers were quite large, about the size of my KG4s, and of course I thought they sounded great (being my first ones, and all). Gave them to a girlfriend in the mid-80's. Probably still using them! My daughter is still using the turntable (it was a separate piece -- "Modular", remember?) for some LPs she found -- I won't give her my old B&O turntable which is packed away in a box. I think the receiver finally met its demise a couple years ago when my Mom and Dad moved. They've been the (un)fortunate dumping ground for all my old equipment. He still has my Pioneer receiver from college, too. (Before you write to the Society to Prevent Cruelty to Parents, bear in mind that I'll be giving him a new Denon A/V receiver and some Quintets for Christmas this year...).
Ahhh, the memories.