Karbala 1979 Iraq National Grid - EPSG:6646

WKT

PROJCS["Karbala_1979_Iraq_National_Grid", 
	GEOGCS["GCS_Karbala_1979_Polservice", 
		DATUM["D_Karbala_1979_Polservice", 
			SPHEROID["Clarke_1880_RGS", 6378249.145, 293.465]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 800000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 46.5], 
	PARAMETER["Scale_Factor", 0.9994], 
	PARAMETER["Latitude_Of_Origin", 29.02626833333333], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["Karbala_1979_Iraq_National_Grid", 
	BASEGEOGCRS["GCS_Karbala_1979_Polservice", 
		DATUM["D_Karbala_1979_Polservice", 
			ELLIPSOID["Clarke_1880_RGS", 6378249.145, 293.465]], 
		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", 800000.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 46.5], 
		PARAMETER["Scale_Factor", 0.9994], 
		PARAMETER["Latitude_Of_Origin", 29.02626833333333]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "6646"]]

Data from @esri/proj-codes

{
  "wkid": 6646,
  "latestWkid": 6646,
  "gcsWkid": 4743,
  "macro": "PE_PCS_KARBALA_1979_IRAQ_NATIONAL_GRID",
  "name": "Karbala_1979_Iraq_National_Grid",
  "wkt": "PROJCS[\"Karbala_1979_Iraq_National_Grid\",GEOGCS[\"GCS_Karbala_1979_Polservice\",DATUM[\"D_Karbala_1979_Polservice\",SPHEROID[\"Clarke_1880_RGS\",6378249.145,293.465]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",800000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",46.5],PARAMETER[\"Scale_Factor\",0.9994],PARAMETER[\"Latitude_Of_Origin\",29.02626833333333],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"Karbala_1979_Iraq_National_Grid\",BASEGEOGCRS[\"GCS_Karbala_1979_Polservice\",DATUM[\"D_Karbala_1979_Polservice\",ELLIPSOID[\"Clarke_1880_RGS\",6378249.145,293.465]],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\",800000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",46.5],PARAMETER[\"Scale_Factor\",0.9994],PARAMETER[\"Latitude_Of_Origin\",29.02626833333333]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"6646\"]]",
  "description": "Karbala 1979 Iraq National Grid",
  "authority": "EPSG",
  "version": "8.3.2(10.3.1)",
  "deprecated": "no",
  "areaname": "Iraq - onshore",
  "extent": {
    "slat": 29.06,
    "nlat": 37.39,
    "llon": 38.79,
    "rlon": 48.61
  }
}