Pulkovo 1942 Caspian Sea Mercator - EPSG:3388

WKT

PROJCS["Pulkovo_1942_Caspian_Sea_Mercator", 
	GEOGCS["GCS_Pulkovo_1942", 
		DATUM["D_Pulkovo_1942", 
			SPHEROID["Krasovsky_1940", 6378245.0, 298.3]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Mercator"], 
	PARAMETER["False_Easting", 0.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 51.0], 
	PARAMETER["Standard_Parallel_1", 42.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["Pulkovo_1942_Caspian_Sea_Mercator", 
	BASEGEOGCRS["GCS_Pulkovo_1942", 
		DATUM["D_Pulkovo_1942", 
			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["Mercator", 
		METHOD["Mercator"], 
		PARAMETER["False_Easting", 0.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 51.0], 
		PARAMETER["Standard_Parallel_1", 42.0]], 
	CS[Cartesian, 2], 
	AXIS["Northing (Y)", north, 
		ORDER[1]], 
	AXIS["Easting (X)", east, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "3388"]]

Data from @esri/proj-codes

{
  "wkid": 3388,
  "latestWkid": 3388,
  "gcsWkid": 4284,
  "macro": "PE_PCS_PULKOVO_1942_CASPIAN_SEA_MERCATOR",
  "name": "Pulkovo_1942_Caspian_Sea_Mercator",
  "wkt": "PROJCS[\"Pulkovo_1942_Caspian_Sea_Mercator\",GEOGCS[\"GCS_Pulkovo_1942\",DATUM[\"D_Pulkovo_1942\",SPHEROID[\"Krasovsky_1940\",6378245.0,298.3]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Mercator\"],PARAMETER[\"False_Easting\",0.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",51.0],PARAMETER[\"Standard_Parallel_1\",42.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"Pulkovo_1942_Caspian_Sea_Mercator\",BASEGEOGCRS[\"GCS_Pulkovo_1942\",DATUM[\"D_Pulkovo_1942\",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[\"Mercator\",METHOD[\"Mercator\"],PARAMETER[\"False_Easting\",0.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",51.0],PARAMETER[\"Standard_Parallel_1\",42.0]],CS[Cartesian,2],AXIS[\"Northing (Y)\",north,ORDER[1]],AXIS[\"Easting (X)\",east,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"3388\"]]",
  "description": "Pulkovo 1942 Caspian Sea Mercator",
  "authority": "EPSG",
  "version": "6.10.1(9.3.0.0)",
  "deprecated": "no",
  "areaname": "Asia - FSU - Caspian Sea",
  "extent": {
    "slat": 37.35,
    "nlat": 46.97,
    "llon": 46.95,
    "rlon": 53.93
  }
}