IGCB 1955 Congo TM Zone 16 - EPSG:3341

WKT

PROJCS["IGCB_1955_Congo_TM_Zone_16", 
	GEOGCS["GCS_IGCB_1955", 
		DATUM["D_Institut_Geographique_du_Congo_Belge_1955", 
			SPHEROID["Clarke_1880_RGS", 6378249.145, 293.465]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 500000.0], 
	PARAMETER["False_Northing", 10000000.0], 
	PARAMETER["Central_Meridian", 16.0], 
	PARAMETER["Scale_Factor", 0.9999], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["IGCB_1955_Congo_TM_Zone_16", 
	BASEGEOGCRS["GCS_IGCB_1955", 
		DATUM["D_Institut_Geographique_du_Congo_Belge_1955", 
			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", 500000.0], 
		PARAMETER["False_Northing", 10000000.0], 
		PARAMETER["Central_Meridian", 16.0], 
		PARAMETER["Scale_Factor", 0.9999], 
		PARAMETER["Latitude_Of_Origin", 0.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "3341"]]

Data from @esri/proj-codes

{
  "wkid": 3341,
  "latestWkid": 3341,
  "gcsWkid": 4701,
  "macro": "PE_PCS_IGCB_1955_CONGO_TM_16",
  "name": "IGCB_1955_Congo_TM_Zone_16",
  "wkt": "PROJCS[\"IGCB_1955_Congo_TM_Zone_16\",GEOGCS[\"GCS_IGCB_1955\",DATUM[\"D_Institut_Geographique_du_Congo_Belge_1955\",SPHEROID[\"Clarke_1880_RGS\",6378249.145,293.465]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",500000.0],PARAMETER[\"False_Northing\",10000000.0],PARAMETER[\"Central_Meridian\",16.0],PARAMETER[\"Scale_Factor\",0.9999],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"IGCB_1955_Congo_TM_Zone_16\",BASEGEOGCRS[\"GCS_IGCB_1955\",DATUM[\"D_Institut_Geographique_du_Congo_Belge_1955\",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\",500000.0],PARAMETER[\"False_Northing\",10000000.0],PARAMETER[\"Central_Meridian\",16.0],PARAMETER[\"Scale_Factor\",0.9999],PARAMETER[\"Latitude_Of_Origin\",0.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"3341\"]]",
  "description": "IGCB 1955 Congo TM Zone 16",
  "authority": "EPSG",
  "version": "7.11.1(9.2.0)",
  "deprecated": "no",
  "areaname": "Congo DR (Zaire) - Bas Congo east of 15~E",
  "extent": {
    "slat": -5.87,
    "nlat": -4.42,
    "llon": 14.99,
    "rlon": 16.28
  }
}