New Zealand Map Grid - EPSG:27200

WKT

PROJCS["GD_1949_New_Zealand_Map_Grid", 
	GEOGCS["GCS_New_Zealand_1949", 
		DATUM["D_New_Zealand_1949", 
			SPHEROID["International_1924", 6378388.0, 297.0]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["New_Zealand_Map_Grid"], 
	PARAMETER["False_Easting", 2510000.0], 
	PARAMETER["False_Northing", 6023150.0], 
	PARAMETER["Longitude_Of_Origin", 173.0], 
	PARAMETER["Latitude_Of_Origin", -41.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["GD_1949_New_Zealand_Map_Grid", 
	BASEGEOGCRS["GCS_New_Zealand_1949", 
		DATUM["D_New_Zealand_1949", 
			ELLIPSOID["International_1924", 6378388.0, 297.0]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["New_Zealand_Map_Grid", 
		METHOD["New_Zealand_Map_Grid"], 
		PARAMETER["False_Easting", 2510000.0], 
		PARAMETER["False_Northing", 6023150.0], 
		PARAMETER["Longitude_Of_Origin", 173.0], 
		PARAMETER["Latitude_Of_Origin", -41.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "27200"]]

Data from @esri/proj-codes

{
  "wkid": 27200,
  "latestWkid": 27200,
  "gcsWkid": 4272,
  "macro": "PE_PCS_NZGD_1949_NEW_ZEALAND_MAP_GRID",
  "name": "GD_1949_New_Zealand_Map_Grid",
  "wkt": "PROJCS[\"GD_1949_New_Zealand_Map_Grid\",GEOGCS[\"GCS_New_Zealand_1949\",DATUM[\"D_New_Zealand_1949\",SPHEROID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"New_Zealand_Map_Grid\"],PARAMETER[\"False_Easting\",2510000.0],PARAMETER[\"False_Northing\",6023150.0],PARAMETER[\"Longitude_Of_Origin\",173.0],PARAMETER[\"Latitude_Of_Origin\",-41.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"GD_1949_New_Zealand_Map_Grid\",BASEGEOGCRS[\"GCS_New_Zealand_1949\",DATUM[\"D_New_Zealand_1949\",ELLIPSOID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"New_Zealand_Map_Grid\",METHOD[\"New_Zealand_Map_Grid\"],PARAMETER[\"False_Easting\",2510000.0],PARAMETER[\"False_Northing\",6023150.0],PARAMETER[\"Longitude_Of_Origin\",173.0],PARAMETER[\"Latitude_Of_Origin\",-41.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"27200\"]]",
  "description": "New Zealand Map Grid",
  "authority": "EPSG",
  "version": "5.1(8.1.0)",
  "deprecated": "no",
  "areaname": "New Zealand - onshore",
  "extent": {
    "slat": -47.33,
    "nlat": -34.1,
    "llon": 166.37,
    "rlon": 178.63
  }
}