Cais da Vila - Porto Santo height - EPSG:6179

WKT

VERTCS["Cais_da_Vila-Porto_Santo_height", 
	VDATUM["Cais_da_Vila-Porto_Santo"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["Cais_da_Vila-Porto_Santo_height", 
	VDATUM["Cais_da_Vila-Porto_Santo"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "6179"]]

Data from @esri/proj-codes

{
  "wkid": 6179,
  "latestWkid": 6179,
  "macro": "PE_VCS_CAIS_DA_VILA_PORTO_SANTO_HT",
  "name": "Cais_da_Vila-Porto_Santo_height",
  "wkt": "VERTCS[\"Cais_da_Vila-Porto_Santo_height\",VDATUM[\"Cais_da_Vila-Porto_Santo\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Cais_da_Vila-Porto_Santo_height\",VDATUM[\"Cais_da_Vila-Porto_Santo\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"6179\"]]",
  "description": "Cais da Vila - Porto Santo height",
  "authority": "EPSG",
  "version": "8.2(10.2.1)",
  "deprecated": "no",
  "areaname": "Portugal - Porto Santo island onshore",
  "extent": {
    "slat": 32.96,
    "nlat": 33.15,
    "llon": -16.44,
    "rlon": -16.23
  }
}