WGS 1972 UTM Zone 56N - EPSG:32256

WKT

PROJCS["WGS_1972_UTM_Zone_56N", 
	GEOGCS["GCS_WGS_1972", 
		DATUM["D_WGS_1972", 
			SPHEROID["WGS_1972", 6378135.0, 298.26]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 500000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 153.0], 
	PARAMETER["Scale_Factor", 0.9996], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["WGS_1972_UTM_Zone_56N", 
	BASEGEOGCRS["GCS_WGS_1972", 
		DYNAMIC[
			FRAMEEPOCH[1972.0]], 
		DATUM["D_WGS_1972", 
			ELLIPSOID["WGS_1972", 6378135.0, 298.26]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 500000.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 153.0], 
		PARAMETER["Scale_Factor", 0.9996], 
		PARAMETER["Latitude_Of_Origin", 0.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "32256"]]

Data from @esri/proj-codes

{
  "wkid": 32256,
  "latestWkid": 32256,
  "gcsWkid": 4322,
  "macro": "PE_PCS_WGS_1972_UTM_56N",
  "name": "WGS_1972_UTM_Zone_56N",
  "wkt": "PROJCS[\"WGS_1972_UTM_Zone_56N\",GEOGCS[\"GCS_WGS_1972\",DATUM[\"D_WGS_1972\",SPHEROID[\"WGS_1972\",6378135.0,298.26]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",153.0],PARAMETER[\"Scale_Factor\",0.9996],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"WGS_1972_UTM_Zone_56N\",BASEGEOGCRS[\"GCS_WGS_1972\",DYNAMIC[FRAMEEPOCH[1972.0]],DATUM[\"D_WGS_1972\",ELLIPSOID[\"WGS_1972\",6378135.0,298.26]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",153.0],PARAMETER[\"Scale_Factor\",0.9996],PARAMETER[\"Latitude_Of_Origin\",0.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"32256\"]]",
  "description": "WGS 1972 UTM Zone 56N",
  "authority": "EPSG",
  "version": "2.1(3.0.1)",
  "deprecated": "no",
  "areaname": "World - N hemisphere - 150~E to 156~E",
  "extent": {
    "slat": 0,
    "nlat": 84,
    "llon": 150,
    "rlon": 156
  }
}