I had a Levin about 28/30 years ago. great sound which many admired but no one but me liked playing it. It had an odd bridge set up comprising 6 individual bridge units which screwed in or out of the main part of the bridge. It was an interesting idea as it meant that you could set the height of individual strings. It was let down by the fact that the screw-in bridge units were made of some type of nylon and were to soft too take too much use of the little gubbins that they supplied for the task of adjusting said units. I have never seen another like that Levin or anyone else using that type of bridge