Mayotte 1950 - EPSG:5793

WKT

VERTCS["Mayotte_1950", 
	VDATUM["Mayotte_1950"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["Mayotte_1950", 
	VDATUM["Mayotte_1950"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "5793"]]

Data from @esri/proj-codes

{
  "wkid": 5793,
  "latestWkid": 5793,
  "macro": "PE_VCS_MAYOTTE_1950",
  "name": "Mayotte_1950",
  "wkt": "VERTCS[\"Mayotte_1950\",VDATUM[\"Mayotte_1950\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Mayotte_1950\",VDATUM[\"Mayotte_1950\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"5793\"]]",
  "description": "Mayotte 1950",
  "authority": "EPSG",
  "version": "6.15(9.3.0.0)",
  "deprecated": "no",
  "areaname": "Mayotte - onshore",
  "extent": {
    "slat": -13.05,
    "nlat": -12.61,
    "llon": 44.98,
    "rlon": 45.35
  }
}