Vintage professional evaluation slide rule LOGAREX 27502 in perfect condition. New old stock slide rules in original leatherette case for the storage (please see the gallery). The shades of the brown color of the case may differ. Leatherette case may wear some small longer storage marks. Dimensions: 580 x 50 x 8,6 mm. Weight without the leatherette case: 270 g. Weight including the case: 500 g.