Grand Cayman National Grid 1959 (Intl Feet) - EPSG:6128

WKT

PROJCS["Grand_Cayman_National_Grid_1959", 
	GEOGCS["GCS_Grand_Cayman_1959", 
		DATUM["D_Grand_Cayman_1959", 
			SPHEROID["Clarke_1866", 6378206.4, 294.9786982]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 1640419.9475], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", -81.0], 
	PARAMETER["Scale_Factor", 0.9996], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Foot", 0.3048]]

WKT2

PROJCRS["Grand_Cayman_National_Grid_1959", 
	BASEGEOGCRS["GCS_Grand_Cayman_1959", 
		DATUM["D_Grand_Cayman_1959", 
			ELLIPSOID["Clarke_1866", 6378206.4, 294.9786982]], 
		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", 1640419.9475, 
			LENGTHUNIT["Foot", 0.3048]], 
		PARAMETER["False_Northing", 0.0, 
			LENGTHUNIT["Foot", 0.3048]], 
		PARAMETER["Central_Meridian", -81.0], 
		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["Foot", 0.3048], 
	ID["EPSG", "6128"]]

Data from @esri/proj-codes

{
  "wkid": 6128,
  "latestWkid": 6128,
  "gcsWkid": 4723,
  "macro": "PE_PCS_GRAND_CAYMAN_NATIONAL_GRID_1959",
  "name": "Grand_Cayman_National_Grid_1959",
  "wkt": "PROJCS[\"Grand_Cayman_National_Grid_1959\",GEOGCS[\"GCS_Grand_Cayman_1959\",DATUM[\"D_Grand_Cayman_1959\",SPHEROID[\"Clarke_1866\",6378206.4,294.9786982]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",1640419.9475],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",-81.0],PARAMETER[\"Scale_Factor\",0.9996],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Foot\",0.3048]]",
  "wkt2": "PROJCRS[\"Grand_Cayman_National_Grid_1959\",BASEGEOGCRS[\"GCS_Grand_Cayman_1959\",DATUM[\"D_Grand_Cayman_1959\",ELLIPSOID[\"Clarke_1866\",6378206.4,294.9786982]],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\",1640419.9475,LENGTHUNIT[\"Foot\",0.3048]],PARAMETER[\"False_Northing\",0.0,LENGTHUNIT[\"Foot\",0.3048]],PARAMETER[\"Central_Meridian\",-81.0],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[\"Foot\",0.3048],ID[\"EPSG\",\"6128\"]]",
  "description": "Grand Cayman National Grid 1959 (Intl Feet)",
  "authority": "EPSG",
  "version": "8.1.2(10.2.1)",
  "deprecated": "no",
  "areaname": "Cayman Islands - Grand Cayman",
  "extent": {
    "slat": 19.21,
    "nlat": 19.41,
    "llon": -81.46,
    "rlon": -81.04
  }
}