ATS 1977 New Brunswick Stereographic - EPSG:2200

WKT

PROJCS["ATS_1977_New_Brunswick_Stereographic", 
	GEOGCS["GCS_ATS_1977", 
		DATUM["D_ATS_1977", 
			SPHEROID["ATS_1977", 6378135.0, 298.257]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Double_Stereographic"], 
	PARAMETER["False_Easting", 300000.0], 
	PARAMETER["False_Northing", 800000.0], 
	PARAMETER["Central_Meridian", -66.5], 
	PARAMETER["Scale_Factor", 0.999912], 
	PARAMETER["Latitude_Of_Origin", 46.5], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["ATS_1977_New_Brunswick_Stereographic", 
	BASEGEOGCRS["GCS_ATS_1977", 
		DATUM["D_ATS_1977", 
			ELLIPSOID["ATS_1977", 6378135.0, 298.257]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Double_Stereographic", 
		METHOD["Double_Stereographic"], 
		PARAMETER["False_Easting", 300000.0], 
		PARAMETER["False_Northing", 800000.0], 
		PARAMETER["Central_Meridian", -66.5], 
		PARAMETER["Scale_Factor", 0.999912], 
		PARAMETER["Latitude_Of_Origin", 46.5]], 
	CS[Cartesian, 2], 
	AXIS["Northing (Y)", north, 
		ORDER[1]], 
	AXIS["Easting (X)", east, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "2200"]]

Data from @esri/proj-codes

{
  "wkid": 2200,
  "latestWkid": 2200,
  "gcsWkid": 4122,
  "macro": "PE_PCS_ATS_1977_NEW_BRUNSWICK",
  "name": "ATS_1977_New_Brunswick_Stereographic",
  "wkt": "PROJCS[\"ATS_1977_New_Brunswick_Stereographic\",GEOGCS[\"GCS_ATS_1977\",DATUM[\"D_ATS_1977\",SPHEROID[\"ATS_1977\",6378135.0,298.257]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Double_Stereographic\"],PARAMETER[\"False_Easting\",300000.0],PARAMETER[\"False_Northing\",800000.0],PARAMETER[\"Central_Meridian\",-66.5],PARAMETER[\"Scale_Factor\",0.999912],PARAMETER[\"Latitude_Of_Origin\",46.5],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"ATS_1977_New_Brunswick_Stereographic\",BASEGEOGCRS[\"GCS_ATS_1977\",DATUM[\"D_ATS_1977\",ELLIPSOID[\"ATS_1977\",6378135.0,298.257]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Double_Stereographic\",METHOD[\"Double_Stereographic\"],PARAMETER[\"False_Easting\",300000.0],PARAMETER[\"False_Northing\",800000.0],PARAMETER[\"Central_Meridian\",-66.5],PARAMETER[\"Scale_Factor\",0.999912],PARAMETER[\"Latitude_Of_Origin\",46.5]],CS[Cartesian,2],AXIS[\"Northing (Y)\",north,ORDER[1]],AXIS[\"Easting (X)\",east,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"2200\"]]",
  "description": "ATS 1977 New Brunswick Stereographic",
  "authority": "EPSG",
  "version": "4.4(8.0.1)",
  "deprecated": "no",
  "areaname": "Canada - New Brunswick",
  "extent": {
    "slat": 44.56,
    "nlat": 48.07,
    "llon": -69.05,
    "rlon": -63.7
  }
}