Pulkovo 1942 Adj 1983 3 Degree GK Zone 6 - EPSG:3841

WKT

PROJCS["Pulkovo_1942_Adj_1983_3_Degree_GK_Zone_6", 
	GEOGCS["GCS_Pulkovo_1942_Adj_1983", 
		DATUM["D_Pulkovo_1942_Adj_1983", 
			SPHEROID["Krasovsky_1940", 6378245.0, 298.3]], 
		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", 1.0], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["Pulkovo_1942_Adj_1983_3_Degree_GK_Zone_6", 
	BASEGEOGCRS["GCS_Pulkovo_1942_Adj_1983", 
		DATUM["D_Pulkovo_1942_Adj_1983", 
			ELLIPSOID["Krasovsky_1940", 6378245.0, 298.3]], 
		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", 1.0], 
		PARAMETER["Latitude_Of_Origin", 0.0]], 
	CS[Cartesian, 2], 
	AXIS["Northing (Y)", north, 
		ORDER[1]], 
	AXIS["Easting (X)", east, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "3841"]]

Data from @esri/proj-codes

{
  "wkid": 3841,
  "latestWkid": 3841,
  "gcsWkid": 4178,
  "macro": "PE_PCS_PULKOVO_1942_ADJ_1983_3_DEG_GK_6",
  "name": "Pulkovo_1942_Adj_1983_3_Degree_GK_Zone_6",
  "wkt": "PROJCS[\"Pulkovo_1942_Adj_1983_3_Degree_GK_Zone_6\",GEOGCS[\"GCS_Pulkovo_1942_Adj_1983\",DATUM[\"D_Pulkovo_1942_Adj_1983\",SPHEROID[\"Krasovsky_1940\",6378245.0,298.3]],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\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"Pulkovo_1942_Adj_1983_3_Degree_GK_Zone_6\",BASEGEOGCRS[\"GCS_Pulkovo_1942_Adj_1983\",DATUM[\"D_Pulkovo_1942_Adj_1983\",ELLIPSOID[\"Krasovsky_1940\",6378245.0,298.3]],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\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0]],CS[Cartesian,2],AXIS[\"Northing (Y)\",north,ORDER[1]],AXIS[\"Easting (X)\",east,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"3841\"]]",
  "description": "Pulkovo 1942 Adj 1983 3 Degree GK Zone 6",
  "authority": "EPSG",
  "version": "7.1.5(10.0.0)",
  "deprecated": "no",
  "areaname": "Europe - 16.5~E to 19.5~E onshore and S-42(83) by country",
  "extent": {
    "slat": 45.74,
    "nlat": 50.45,
    "llon": 16.5,
    "rlon": 19.5
  }
}