NTF (Paris) Lambert Zone III - EPSG:27573

WKT

PROJCS["NTF_Paris_Lambert_Zone_III", 
	GEOGCS["GCS_NTF_Paris", 
		DATUM["D_NTF", 
			SPHEROID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
		PRIMEM["Paris", 2.337229166666667], 
		UNIT["Grad", 0.01570796326794897]], 
	PROJECTION["Lambert_Conformal_Conic"], 
	PARAMETER["False_Easting", 600000.0], 
	PARAMETER["False_Northing", 3200000.0], 
	PARAMETER["Central_Meridian", 0.0], 
	PARAMETER["Standard_Parallel_1", 49.0], 
	PARAMETER["Scale_Factor", 0.999877499], 
	PARAMETER["Latitude_Of_Origin", 49.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["NTF_Paris_Lambert_Zone_III", 
	BASEGEOGCRS["GCS_NTF_Paris", 
		DATUM["D_NTF", 
			ELLIPSOID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
		PRIMEM["Paris", 2.337229166666667, 
			ANGLEUNIT["Degree", 0.0174532925199433]], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Grad", 0.01570796326794897]], 
	CONVERSION["Lambert_Conformal_Conic", 
		METHOD["Lambert_Conformal_Conic"], 
		PARAMETER["False_Easting", 600000.0], 
		PARAMETER["False_Northing", 3200000.0], 
		PARAMETER["Central_Meridian", 0.0, 
			ANGLEUNIT["Grad", 0.01570796326794897]], 
		PARAMETER["Standard_Parallel_1", 49.0, 
			ANGLEUNIT["Grad", 0.01570796326794897]], 
		PARAMETER["Scale_Factor", 0.999877499], 
		PARAMETER["Latitude_Of_Origin", 49.0, 
			ANGLEUNIT["Grad", 0.01570796326794897]]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "27573"]]

Data from @esri/proj-codes

{
  "wkid": 27573,
  "latestWkid": 27573,
  "gcsWkid": 4807,
  "macro": "PE_PCS_NTF_PARIS_LAMBERT_III",
  "name": "NTF_Paris_Lambert_Zone_III",
  "wkt": "PROJCS[\"NTF_Paris_Lambert_Zone_III\",GEOGCS[\"GCS_NTF_Paris\",DATUM[\"D_NTF\",SPHEROID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Paris\",2.337229166666667],UNIT[\"Grad\",0.01570796326794897]],PROJECTION[\"Lambert_Conformal_Conic\"],PARAMETER[\"False_Easting\",600000.0],PARAMETER[\"False_Northing\",3200000.0],PARAMETER[\"Central_Meridian\",0.0],PARAMETER[\"Standard_Parallel_1\",49.0],PARAMETER[\"Scale_Factor\",0.999877499],PARAMETER[\"Latitude_Of_Origin\",49.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"NTF_Paris_Lambert_Zone_III\",BASEGEOGCRS[\"GCS_NTF_Paris\",DATUM[\"D_NTF\",ELLIPSOID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Paris\",2.337229166666667,ANGLEUNIT[\"Degree\",0.0174532925199433]],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Grad\",0.01570796326794897]],CONVERSION[\"Lambert_Conformal_Conic\",METHOD[\"Lambert_Conformal_Conic\"],PARAMETER[\"False_Easting\",600000.0],PARAMETER[\"False_Northing\",3200000.0],PARAMETER[\"Central_Meridian\",0.0,ANGLEUNIT[\"Grad\",0.01570796326794897]],PARAMETER[\"Standard_Parallel_1\",49.0,ANGLEUNIT[\"Grad\",0.01570796326794897]],PARAMETER[\"Scale_Factor\",0.999877499],PARAMETER[\"Latitude_Of_Origin\",49.0,ANGLEUNIT[\"Grad\",0.01570796326794897]]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"27573\"]]",
  "description": "NTF (Paris) Lambert Zone III",
  "authority": "EPSG",
  "version": "5.3(9.3.0.0)",
  "deprecated": "no",
  "areaname": "France - mainland south of 45.45~N",
  "extent": {
    "slat": 42.33,
    "nlat": 45.46,
    "llon": -1.79,
    "rlon": 7.71
  }
}