Hanoi 1972 GK Zone 18 - EPSG:2044

WKT

PROJCS["Hanoi_1972_GK_Zone_18", 
	GEOGCS["GCS_Hanoi_1972", 
		DATUM["D_Hanoi_1972", 
			SPHEROID["Krasovsky_1940", 6378245.0, 298.3]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Gauss_Kruger"], 
	PARAMETER["False_Easting", 18500000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 105.0], 
	PARAMETER["Scale_Factor", 1.0], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["Hanoi_1972_GK_Zone_18", 
	BASEGEOGCRS["GCS_Hanoi_1972", 
		DATUM["D_Hanoi_1972", 
			ELLIPSOID["Krasovsky_1940", 6378245.0, 298.3]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Gauss_Kruger", 
		METHOD["Gauss_Kruger"], 
		PARAMETER["False_Easting", 18500000.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 105.0], 
		PARAMETER["Scale_Factor", 1.0], 
		PARAMETER["Latitude_Of_Origin", 0.0]], 
	CS[Cartesian, 2], 
	AXIS["Northing (Y)", north, 
		ORDER[1]], 
	AXIS["Easting (X)", east, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "2044"]]

Data from @esri/proj-codes

{
  "wkid": 2044,
  "latestWkid": 2044,
  "gcsWkid": 4147,
  "macro": "PE_PCS_HANOI_1972_GK_18",
  "name": "Hanoi_1972_GK_Zone_18",
  "wkt": "PROJCS[\"Hanoi_1972_GK_Zone_18\",GEOGCS[\"GCS_Hanoi_1972\",DATUM[\"D_Hanoi_1972\",SPHEROID[\"Krasovsky_1940\",6378245.0,298.3]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",18500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",105.0],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"Hanoi_1972_GK_Zone_18\",BASEGEOGCRS[\"GCS_Hanoi_1972\",DATUM[\"D_Hanoi_1972\",ELLIPSOID[\"Krasovsky_1940\",6378245.0,298.3]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Gauss_Kruger\",METHOD[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",18500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",105.0],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0]],CS[Cartesian,2],AXIS[\"Northing (Y)\",north,ORDER[1]],AXIS[\"Easting (X)\",east,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"2044\"]]",
  "description": "Hanoi 1972 GK Zone 18",
  "authority": "EPSG",
  "version": "4.5(8.1.0)",
  "deprecated": "no",
  "areaname": "Vietnam - west of 108~E onshore",
  "extent": {
    "slat": 8.33,
    "nlat": 23.4,
    "llon": 102.14,
    "rlon": 108
  }
}