sentences:  It featured two P-90 pickups with either a stoptail bridge or an optional Vibrola.On this mid-level SG model, Gibson kept the neck binding but used dot inlays in place of the trapezoid position markers of the standard model and did not use the crown inlay on the headstock.With various minor changes (bridge and tailpiece replacing the stoptail in 1972, mini humbucker pickups between 1972 and 1976 and full sized open-coil humbuckers thereafter) the model has remained in continuous production.