Original Durst 11720-1 (Lapla 32) Lens Board - 32mm Lens Screw Fit - Modified
Flat lens board designed for enlarging lenses that have a 32mm screw thread.
It has been drilled to accept a flange board I think, it can still be used as a 11720-1 32mm lens board but you may need to tape over holes (to prevent light leak)
Good used condition.