Saba 3D - EPSG:10635

WKT

GEOGCS["Saba_3D", 
	DATUM["Saba", 
		SPHEROID["International_1924", 6378388.0, 297.0]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433], 
	LINUNIT["Meter", 1.0]]

WKT2

GEOGCRS["Saba_3D", 
	DATUM["Saba", 
		ELLIPSOID["International_1924", 6378388.0, 297.0]], 
	PRIMEM["Greenwich", 0.0], 
	CS[ellipsoidal, 3], 
	AXIS["Latitude (lat)", north, 
		ORDER[1], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	AXIS["Longitude (lon)", east, 
		ORDER[2], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	AXIS["Ellipsoidal height (h)", up, 
		ORDER[3], 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "10635"]]

Data from @esri/proj-codes

{
  "wkid": 10635,
  "latestWkid": 10635,
  "macro": "PE_GCS_SABA_3D",
  "name": "Saba_3D",
  "wkt": "GEOGCS[\"Saba_3D\",DATUM[\"Saba\",SPHEROID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433],LINUNIT[\"Meter\",1.0]]",
  "wkt2": "GEOGCRS[\"Saba_3D\",DATUM[\"Saba\",ELLIPSOID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,3],AXIS[\"Latitude (lat)\",north,ORDER[1],ANGLEUNIT[\"Degree\",0.0174532925199433]],AXIS[\"Longitude (lon)\",east,ORDER[2],ANGLEUNIT[\"Degree\",0.0174532925199433]],AXIS[\"Ellipsoidal height (h)\",up,ORDER[3],LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"10635\"]]",
  "description": "Saba 3D",
  "authority": "EPSG",
  "version": "11.023(13.5.0)",
  "deprecated": "no",
  "areaname": "BES Islands - Saba onshore",
  "extent": {
    "slat": 17.56,
    "nlat": 17.71,
    "llon": -63.31,
    "rlon": -63.16
  }
}