Kertau RSO Malaya Chains (Benoit 1895 B) (deprecated, 3.6, use 3167) - EPSG:24571

WKT

PROJCS["Kertau_RSO_Malaya_Chains", 
	GEOGCS["GCS_Kertau", 
		DATUM["D_Kertau", 
			SPHEROID["Everest_1830_Modified", 6377304.063, 300.8017]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Rectified_Skew_Orthomorphic_Natural_Origin"], 
	PARAMETER["False_Easting", 40000.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Scale_Factor", 0.99984], 
	PARAMETER["Azimuth", -36.97420943711801], 
	PARAMETER["Longitude_Of_Center", 102.25], 
	PARAMETER["Latitude_Of_Center", 4.0], 
	PARAMETER["XY_Plane_Rotation", -36.86989764584402], 
	UNIT["Chain_Benoit_1895_B", 20.11678249437587]]

WKT2

PROJCRS["Kertau_RSO_Malaya_Chains", 
	BASEGEOGCRS["GCS_Kertau", 
		DATUM["D_Kertau", 
			ELLIPSOID["Everest_1830_Modified", 6377304.063, 300.8017]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Rectified_Skew_Orthomorphic_Natural_Origin", 
		METHOD["Rectified_Skew_Orthomorphic_Natural_Origin"], 
		PARAMETER["False_Easting", 40000.0, 
			LENGTHUNIT["Chain_Benoit_1895_B", 20.11678249437587]], 
		PARAMETER["False_Northing", 0.0, 
			LENGTHUNIT["Chain_Benoit_1895_B", 20.11678249437587]], 
		PARAMETER["Scale_Factor", 0.99984], 
		PARAMETER["Azimuth", -36.97420943711801], 
		PARAMETER["Longitude_Of_Center", 102.25], 
		PARAMETER["Latitude_Of_Center", 4.0], 
		PARAMETER["XY_Plane_Rotation", -36.86989764584402]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Chain_Benoit_1895_B", 20.11678249437587], 
	ID["EPSG", "24571"]]

Data from @esri/proj-codes

{
  "wkid": 24571,
  "latestWkid": 24571,
  "gcsWkid": 4245,
  "macro": "PE_PCS_KERTAU_RSO_MALAYA_CH",
  "name": "Kertau_RSO_Malaya_Chains",
  "wkt": "PROJCS[\"Kertau_RSO_Malaya_Chains\",GEOGCS[\"GCS_Kertau\",DATUM[\"D_Kertau\",SPHEROID[\"Everest_1830_Modified\",6377304.063,300.8017]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Rectified_Skew_Orthomorphic_Natural_Origin\"],PARAMETER[\"False_Easting\",40000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Scale_Factor\",0.99984],PARAMETER[\"Azimuth\",-36.97420943711801],PARAMETER[\"Longitude_Of_Center\",102.25],PARAMETER[\"Latitude_Of_Center\",4.0],PARAMETER[\"XY_Plane_Rotation\",-36.86989764584402],UNIT[\"Chain_Benoit_1895_B\",20.11678249437587]]",
  "wkt2": "PROJCRS[\"Kertau_RSO_Malaya_Chains\",BASEGEOGCRS[\"GCS_Kertau\",DATUM[\"D_Kertau\",ELLIPSOID[\"Everest_1830_Modified\",6377304.063,300.8017]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Rectified_Skew_Orthomorphic_Natural_Origin\",METHOD[\"Rectified_Skew_Orthomorphic_Natural_Origin\"],PARAMETER[\"False_Easting\",40000.0,LENGTHUNIT[\"Chain_Benoit_1895_B\",20.11678249437587]],PARAMETER[\"False_Northing\",0.0,LENGTHUNIT[\"Chain_Benoit_1895_B\",20.11678249437587]],PARAMETER[\"Scale_Factor\",0.99984],PARAMETER[\"Azimuth\",-36.97420943711801],PARAMETER[\"Longitude_Of_Center\",102.25],PARAMETER[\"Latitude_Of_Center\",4.0],PARAMETER[\"XY_Plane_Rotation\",-36.86989764584402]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Chain_Benoit_1895_B\",20.11678249437587],ID[\"EPSG\",\"24571\"]]",
  "description": "Kertau RSO Malaya Chains (Benoit 1895 B) (deprecated, 3.6, use 3167)",
  "authority": "EPSG",
  "version": "4.4(9.0.0)",
  "deprecated": "yes",
  "areaname": "Malaysia - West Malaysia - onshore",
  "extent": {
    "slat": 1.21,
    "nlat": 6.72,
    "llon": 99.59,
    "rlon": 104.6
  }
}