Germany Zone 4 - ESRI:103975

WKT

PROJCS["Germany_Zone_4", 
	GEOGCS["GCS_Deutsches_Hauptdreiecksnetz", 
		DATUM["D_Deutsches_Hauptdreiecksnetz", 
			SPHEROID["Bessel_1841", 6377397.155, 299.1528128]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 4500000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 12.0], 
	PARAMETER["Scale_Factor", 1.0], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["Germany_Zone_4", 
	BASEGEOGCRS["GCS_Deutsches_Hauptdreiecksnetz", 
		DATUM["D_Deutsches_Hauptdreiecksnetz", 
			ELLIPSOID["Bessel_1841", 6377397.155, 299.1528128]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 4500000.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 12.0], 
		PARAMETER["Scale_Factor", 1.0], 
		PARAMETER["Latitude_Of_Origin", 0.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["Esri", "103975"]]

Data from @esri/proj-codes

{
  "wkid": 103975,
  "latestWkid": 103975,
  "gcsWkid": 4314,
  "macro": "PE_PCS_DHDN_GERMANY_4",
  "name": "Germany_Zone_4",
  "wkt": "PROJCS[\"Germany_Zone_4\",GEOGCS[\"GCS_Deutsches_Hauptdreiecksnetz\",DATUM[\"D_Deutsches_Hauptdreiecksnetz\",SPHEROID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",4500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",12.0],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"Germany_Zone_4\",BASEGEOGCRS[\"GCS_Deutsches_Hauptdreiecksnetz\",DATUM[\"D_Deutsches_Hauptdreiecksnetz\",ELLIPSOID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",4500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",12.0],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"Esri\",\"103975\"]]",
  "description": "Germany Zone 4",
  "authority": "Esri",
  "version": "13.1.0",
  "deprecated": "no",
  "areaname": "Germany - West Germany - 10.5~E to 13.5~E",
  "extent": {
    "slat": 47.39,
    "nlat": 54.59,
    "llon": 10.5,
    "rlon": 13.51
  }
}