Located on the outer wall of the former Dominion Building (former Hamilton Post Office), which is now a part of the court house. From the corner of King and John, proceed south on John to find the benchmark. Listed as a Vertical Control station in the Passive Control Network database.
Coordinates scaled from map
Hamilton-wentworth
Post office on the southwest corner of king street east and john street south, tablet in the east stone foundation wall, 8.26 m south of the northeast corner, 2.71 m below a window sill and 42 cm above sidewalk level.
source: https://webapp.geod.nrcan.gc.ca/geod/data-donnees/station/report-rapport.php?id=63U3491