Luzon 1911 - EPSG:4253

WKT

GEOGCS["GCS_Luzon_1911", 
	DATUM["D_Luzon_1911", 
		SPHEROID["Clarke_1866", 6378206.4, 294.9786982]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_Luzon_1911", 
	DATUM["D_Luzon_1911", 
		ELLIPSOID["Clarke_1866", 6378206.4, 294.9786982]], 
	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", "4253"]]

Data from @esri/proj-codes

{
  "wkid": 4253,
  "latestWkid": 4253,
  "macro": "PE_GCS_LUZON_1911",
  "name": "GCS_Luzon_1911",
  "wkt": "GEOGCS[\"GCS_Luzon_1911\",DATUM[\"D_Luzon_1911\",SPHEROID[\"Clarke_1866\",6378206.4,294.9786982]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_Luzon_1911\",DATUM[\"D_Luzon_1911\",ELLIPSOID[\"Clarke_1866\",6378206.4,294.9786982]],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\",\"4253\"]]",
  "description": "Luzon 1911",
  "authority": "EPSG",
  "version": "6.5(3.0.1)",
  "deprecated": "no",
  "areaname": "Philippines - onshore",
  "extent": {
    "slat": 4.99,
    "nlat": 19.45,
    "llon": 116.89,
    "rlon": 126.65
  }
}