Douala - EPSG:4228

WKT

GEOGCS["GCS_Douala", 
	DATUM["D_Douala", 
		SPHEROID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_Douala", 
	DATUM["D_Douala", 
		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], 
	ID["EPSG", "4228"]]

Data from @esri/proj-codes

{
  "wkid": 4228,
  "latestWkid": 4228,
  "macro": "PE_GCS_DOUALA",
  "name": "GCS_Douala",
  "wkt": "GEOGCS[\"GCS_Douala\",DATUM[\"D_Douala\",SPHEROID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_Douala\",DATUM[\"D_Douala\",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],ID[\"EPSG\",\"4228\"]]",
  "description": "Douala",
  "authority": "EPSG",
  "version": "2.1(3.0.1)",
  "deprecated": "no",
  "areaname": "Cameroon",
  "extent": {
    "slat": 1.65,
    "nlat": 13.09,
    "llon": 8.32,
    "rlon": 16.21
  }
}