NTF France I (degrees) - ESRI:102581

WKT

PROJCS["NTF_France_I_degrees", 
	GEOGCS["GCS_NTF", 
		DATUM["D_NTF", 
			SPHEROID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Lambert_Conformal_Conic"], 
	PARAMETER["False_Easting", 600000.0], 
	PARAMETER["False_Northing", 1200000.0], 
	PARAMETER["Central_Meridian", 2.337229166666667], 
	PARAMETER["Standard_Parallel_1", 49.5], 
	PARAMETER["Scale_Factor", 0.999877341], 
	PARAMETER["Latitude_Of_Origin", 49.5], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["NTF_France_I_degrees", 
	BASEGEOGCRS["GCS_NTF", 
		DATUM["D_NTF", 
			ELLIPSOID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Lambert_Conformal_Conic", 
		METHOD["Lambert_Conformal_Conic"], 
		PARAMETER["False_Easting", 600000.0], 
		PARAMETER["False_Northing", 1200000.0], 
		PARAMETER["Central_Meridian", 2.337229166666667], 
		PARAMETER["Standard_Parallel_1", 49.5], 
		PARAMETER["Scale_Factor", 0.999877341], 
		PARAMETER["Latitude_Of_Origin", 49.5]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["Esri", "102581"]]

Data from @esri/proj-codes

{
  "wkid": 102581,
  "latestWkid": 102581,
  "gcsWkid": 4275,
  "macro": "PE_PCS_NTF_FRANCE_I_DEG",
  "name": "NTF_France_I_degrees",
  "wkt": "PROJCS[\"NTF_France_I_degrees\",GEOGCS[\"GCS_NTF\",DATUM[\"D_NTF\",SPHEROID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Lambert_Conformal_Conic\"],PARAMETER[\"False_Easting\",600000.0],PARAMETER[\"False_Northing\",1200000.0],PARAMETER[\"Central_Meridian\",2.337229166666667],PARAMETER[\"Standard_Parallel_1\",49.5],PARAMETER[\"Scale_Factor\",0.999877341],PARAMETER[\"Latitude_Of_Origin\",49.5],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"NTF_France_I_degrees\",BASEGEOGCRS[\"GCS_NTF\",DATUM[\"D_NTF\",ELLIPSOID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Lambert_Conformal_Conic\",METHOD[\"Lambert_Conformal_Conic\"],PARAMETER[\"False_Easting\",600000.0],PARAMETER[\"False_Northing\",1200000.0],PARAMETER[\"Central_Meridian\",2.337229166666667],PARAMETER[\"Standard_Parallel_1\",49.5],PARAMETER[\"Scale_Factor\",0.999877341],PARAMETER[\"Latitude_Of_Origin\",49.5]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"Esri\",\"102581\"]]",
  "description": "NTF France I (degrees)",
  "authority": "Esri",
  "version": "8.1.0",
  "deprecated": "no",
  "areaname": "France - mainland north of 48.15~N",
  "extent": {
    "slat": 48.14,
    "nlat": 51.14,
    "llon": -4.87,
    "rlon": 8.23
  }
}