Lewis Swift discovered NGC 5137 = Sw. VI-57 on 17 Apr 1887 and recorded "eeeF; pL; ee diff; [NGC 5132] preceding; [NGC 5129] south-preceding." His position is 17 sec of RA east of CGCG 072-071 and the description fits.
400/500mm - 17.5" (5/23/98): not found, though there was heavy dew affecting the observation.
Notes by Steve Gottlieb