Vintage Sears Tele Games Center - Storage Case Atari 2600
Nice tall plastic unit to hold your cartridges and controllers with the Atari sitting on top.
It's a Music Mate TC-1000 by ALS Industries
It's in good condition, shows some wear, but the top does have two small cracks: one in the front left corner, one in the rear right corner.
It has slots for 27 cartridges. Intellivision games don't fit.