DB_REF 3D - EPSG:5830

WKT

GEOGCS["DB_REF_3D", 
	DATUM["D_Deutsche_Bahn_Reference_System", 
		SPHEROID["Bessel_1841", 6377397.155, 299.1528128]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433], 
	LINUNIT["Meter", 1.0]]

WKT2

GEOGCRS["DB_REF_3D", 
	DATUM["D_Deutsche_Bahn_Reference_System", 
		ELLIPSOID["Bessel_1841", 6377397.155, 299.1528128]], 
	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", "5830"]]

Data from @esri/proj-codes

{
  "wkid": 5830,
  "latestWkid": 5830,
  "macro": "PE_GCS_DB_REF_3D",
  "name": "DB_REF_3D",
  "wkt": "GEOGCS[\"DB_REF_3D\",DATUM[\"D_Deutsche_Bahn_Reference_System\",SPHEROID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433],LINUNIT[\"Meter\",1.0]]",
  "wkt2": "GEOGCRS[\"DB_REF_3D\",DATUM[\"D_Deutsche_Bahn_Reference_System\",ELLIPSOID[\"Bessel_1841\",6377397.155,299.1528128]],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\",\"5830\"]]",
  "description": "DB_REF 3D",
  "authority": "EPSG",
  "version": "7.9.5(12.7.0)",
  "deprecated": "no",
  "areaname": "Germany - onshore",
  "extent": {
    "slat": 47.27,
    "nlat": 55.09,
    "llon": 5.86,
    "rlon": 15.04
  }
}