I can't honestly remember, it was a long time ago. I think that Rotosound were among the first to produce this particular design of string, though, and if the strings on the Ovation have been there a long time it shortens the odds. I loved the clarity and definition it gave the sound, in contrast to the flatwounds that most people were using at the time. You'll probably hate it. Kudos to The59Sound who also suggested Rotos, I missed his posting in the thread earlier.
The modern version uses a different setup, which allows you to adjust the length of the winding-free portion by moving the ball end, so it fits on a variety of basses.