Abstract: An elongated gauge support body plate is provided including opposite side longitudinal margins equipped with opposite end abutment blocks projecting outwardly from one side of the plate for seated engagement with a partial cylindrical surface. The plate defines a center longitudinal plane for containing the center axis of a cylindrical surface with which the abutment blocks are abuttingly engaged and along which probe-type indicators may be supported to indicate blanket cylinder height in relation to blanket cylinder end bearer height when the plate is supported adjacent one end of a press blanket cylinder.