EUREF-FIN TM35FIN - ESRI:102139

WKT

PROJCS["EUREF-FIN_TM35FIN", 
	GEOGCS["GCS_EUREF_FIN", 
		DATUM["EUREF-FIN", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 500000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 27.0], 
	PARAMETER["Scale_Factor", 0.9996], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["EUREF-FIN_TM35FIN", 
	BASEGEOGCRS["GCS_EUREF_FIN", 
		DATUM["EUREF-FIN", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101], 
			ANCHOREPOCH[1997.0]], 
		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", 500000.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 27.0], 
		PARAMETER["Scale_Factor", 0.9996], 
		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", "3067"]]

Data from @esri/proj-codes

{
  "wkid": 102139,
  "latestWkid": 3067,
  "gcsWkid": 10690,
  "macro": "PE_PCS_EUREF_FIN_TM35FIN",
  "name": "EUREF-FIN_TM35FIN",
  "wkt": "PROJCS[\"EUREF-FIN_TM35FIN\",GEOGCS[\"GCS_EUREF_FIN\",DATUM[\"EUREF-FIN\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",27.0],PARAMETER[\"Scale_Factor\",0.9996],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"EUREF-FIN_TM35FIN\",BASEGEOGCRS[\"GCS_EUREF_FIN\",DATUM[\"EUREF-FIN\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101],ANCHOREPOCH[1997.0]],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\",500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",27.0],PARAMETER[\"Scale_Factor\",0.9996],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\",\"3067\"]]",
  "description": "EUREF-FIN TM35FIN",
  "authority": "Esri",
  "version": "9.0.0",
  "deprecated": "codechange",
  "areaname": "Finland",
  "extent": {
    "slat": 58.84,
    "nlat": 70.09,
    "llon": 19.08,
    "rlon": 31.59
  }
}