UWPP 2000 pas 6 - ESRI:102196

WKT

PROJCS["UWPP_2000_PAS_6", 
	GEOGCS["GCS_ETRF_1989", 
		DATUM["D_ETRF_1989", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Gauss_Kruger"], 
	PARAMETER["False_Easting", 6500000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 18.0], 
	PARAMETER["Scale_Factor", 0.999923], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["UWPP_2000_PAS_6", 
	BASEGEOGCRS["GCS_ETRF_1989", 
		DYNAMIC[
			FRAMEEPOCH[1989.0], 
			MODEL["AM0-2"]], 
		DATUM["D_ETRF_1989", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Gauss_Kruger", 
		METHOD["Gauss_Kruger"], 
		PARAMETER["False_Easting", 6500000.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 18.0], 
		PARAMETER["Scale_Factor", 0.999923], 
		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", "102196"]]

Data from @esri/proj-codes

{
  "wkid": 102196,
  "latestWkid": 102196,
  "gcsWkid": 9059,
  "macro": "PE_PCS_UWPP_2000_PAS_6",
  "name": "UWPP_2000_PAS_6",
  "wkt": "PROJCS[\"UWPP_2000_PAS_6\",GEOGCS[\"GCS_ETRF_1989\",DATUM[\"D_ETRF_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",6500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",18.0],PARAMETER[\"Scale_Factor\",0.999923],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"UWPP_2000_PAS_6\",BASEGEOGCRS[\"GCS_ETRF_1989\",DYNAMIC[FRAMEEPOCH[1989.0],MODEL[\"AM0-2\"]],DATUM[\"D_ETRF_1989\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Gauss_Kruger\",METHOD[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",6500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",18.0],PARAMETER[\"Scale_Factor\",0.999923],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\",\"102196\"]]",
  "description": "UWPP 2000 pas 6",
  "authority": "Esri",
  "version": "8.1.2",
  "deprecated": "no",
  "areaname": "Poland - 16.5~E to 19.5~E",
  "extent": {
    "slat": 49.39,
    "nlat": 55.93,
    "llon": 16.5,
    "rlon": 19.5
  }
}