SVY21 Singapore TM - EPSG:3414

WKT

PROJCS["SVY21_Singapore_TM", 
	GEOGCS["GCS_SVY21", 
		DATUM["D_SVY21", 
			SPHEROID["WGS_1984", 6378137.0, 298.257223563]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 28001.642], 
	PARAMETER["False_Northing", 38744.572], 
	PARAMETER["Central_Meridian", 103.8333333333333], 
	PARAMETER["Scale_Factor", 1.0], 
	PARAMETER["Latitude_Of_Origin", 1.366666666666667], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["SVY21_Singapore_TM", 
	BASEGEOGCRS["GCS_SVY21", 
		DATUM["D_SVY21", 
			ELLIPSOID["WGS_1984", 6378137.0, 298.257223563]], 
		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", 28001.642], 
		PARAMETER["False_Northing", 38744.572], 
		PARAMETER["Central_Meridian", 103.8333333333333], 
		PARAMETER["Scale_Factor", 1.0], 
		PARAMETER["Latitude_Of_Origin", 1.366666666666667]], 
	CS[Cartesian, 2], 
	AXIS["Northing (Y)", north, 
		ORDER[1]], 
	AXIS["Easting (X)", east, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "3414"]]

Data from @esri/proj-codes

{
  "wkid": 3414,
  "latestWkid": 3414,
  "gcsWkid": 4757,
  "macro": "PE_PCS_SVY21",
  "name": "SVY21_Singapore_TM",
  "wkt": "PROJCS[\"SVY21_Singapore_TM\",GEOGCS[\"GCS_SVY21\",DATUM[\"D_SVY21\",SPHEROID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",28001.642],PARAMETER[\"False_Northing\",38744.572],PARAMETER[\"Central_Meridian\",103.8333333333333],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",1.366666666666667],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"SVY21_Singapore_TM\",BASEGEOGCRS[\"GCS_SVY21\",DATUM[\"D_SVY21\",ELLIPSOID[\"WGS_1984\",6378137.0,298.257223563]],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\",28001.642],PARAMETER[\"False_Northing\",38744.572],PARAMETER[\"Central_Meridian\",103.8333333333333],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",1.366666666666667]],CS[Cartesian,2],AXIS[\"Northing (Y)\",north,ORDER[1]],AXIS[\"Easting (X)\",east,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"3414\"]]",
  "description": "SVY21 Singapore TM",
  "authority": "EPSG",
  "version": "9.5.5(9.3.0.0)",
  "deprecated": "no",
  "areaname": "Singapore",
  "extent": {
    "slat": 1.13,
    "nlat": 1.47,
    "llon": 103.59,
    "rlon": 104.07
  }
}