Camshaft Identification

From the latest information I've found it's an Elgin E-1828-SR grind, probably superseded by one of these grinds from the Elgin catalog.
E-578-S 1500-4000 Int .429 279 209 50 Hyd. 112 HL-2011 Exh .444 289 220 116 CL-578K