Anna 1 Astro 1965 - EPSG:4708

WKT

GEOGCS["GCS_Anna_1_1965", 
	DATUM["D_Anna_1_1965", 
		SPHEROID["Australian", 6378160.0, 298.25]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_Anna_1_1965", 
	DATUM["D_Anna_1_1965", 
		ELLIPSOID["Australian", 6378160.0, 298.25]], 
	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", "4708"]]

Data from @esri/proj-codes

{
  "wkid": 4708,
  "latestWkid": 4708,
  "macro": "PE_GCS_ANNA_1_1965",
  "name": "GCS_Anna_1_1965",
  "wkt": "GEOGCS[\"GCS_Anna_1_1965\",DATUM[\"D_Anna_1_1965\",SPHEROID[\"Australian\",6378160.0,298.25]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_Anna_1_1965\",DATUM[\"D_Anna_1_1965\",ELLIPSOID[\"Australian\",6378160.0,298.25]],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\",\"4708\"]]",
  "description": "Anna 1 Astro 1965",
  "authority": "EPSG",
  "version": "6.9(9.3.0.0)",
  "deprecated": "no",
  "areaname": "Cocos (Keeling) Islands - onshore",
  "extent": {
    "slat": -12.27,
    "nlat": -11.76,
    "llon": 96.76,
    "rlon": 96.99
  }
}