HA - The etched "MONTEZUMA" tells me the surveyors did not bring their letter stamping equipment.
Note - All the letters are 'hammer tapped' in, with a screw driver head, as the letters all have straight lines.
Also note the backward "N" and "Z". (OOPs)
OH, and Monte BM (further down the ridgeline), uses this BM as its azimuth mark.