Any idea as to what year these were introduced? Have a set that I had gotten for free, no life initially. After getting into the control box (attached to the plug), I found that the last owner had used these outdoors, enough moisture worked it's way into the box to eat one of the rectifier diodes, and the fuse off the board.
After replacing all four of the rectifier diodes, the missing fuse (jumpered for now, may connect it through a fused cord made from discarded modern sets), main filter cap (a Jamicon 100uF/50V that tested low, replaced with a "Illinois Capacitor (IC)"), then temporarily connecting the three strings to the AC lines, and using my lightkeeper pro on each one to get them to light (I put each one back on it's respective triac after), I now have a fully working set. Interesting that this string has no green lamps, only red, orange and blue...
Features three or four patterns (including steady on), that the speeds can be adjusted on. First time I seen a controller box of this type with the AC plug integrated into it.