Gusterberg (Ferro) - EPSG:8042

WKT

GEOGCS["Gusterberg(Ferro)", 
	DATUM["Gusterberg_(Ferro)", 
		SPHEROID["Zach_1812", 6376045.0, 310.0]], 
	PRIMEM["Ferro", -17.66666666666667], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["Gusterberg(Ferro)", 
	DATUM["Gusterberg_(Ferro)", 
		ELLIPSOID["Zach_1812", 6376045.0, 310.0]], 
	PRIMEM["Ferro", -17.66666666666667, 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CS[ellipsoidal, 2], 
	AXIS["Latitude (lat)", north, 
		ORDER[1]], 
	AXIS["Longitude (lon)", east, 
		ORDER[2]], 
	ANGLEUNIT["Degree", 0.0174532925199433], 
	ID["EPSG", "8042"]]

Data from @esri/proj-codes

{
  "wkid": 8042,
  "latestWkid": 8042,
  "macro": "PE_GCS_GUSTERBERG_FERRO",
  "name": "Gusterberg(Ferro)",
  "wkt": "GEOGCS[\"Gusterberg(Ferro)\",DATUM[\"Gusterberg_(Ferro)\",SPHEROID[\"Zach_1812\",6376045.0,310.0]],PRIMEM[\"Ferro\",-17.66666666666667],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"Gusterberg(Ferro)\",DATUM[\"Gusterberg_(Ferro)\",ELLIPSOID[\"Zach_1812\",6376045.0,310.0]],PRIMEM[\"Ferro\",-17.66666666666667,ANGLEUNIT[\"Degree\",0.0174532925199433]],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433],ID[\"EPSG\",\"8042\"]]",
  "description": "Gusterberg (Ferro)",
  "authority": "EPSG",
  "version": "9.1(10.6.0)",
  "deprecated": "no",
  "areaname": "Europe - Upper Austria, Salzburg and Bohemia",
  "extent": {
    "slat": 46.93,
    "nlat": 51.06,
    "llon": 12.07,
    "rlon": 16.83
  }
}