Santa Cruz da Graciosa height - EPSG:6183

WKT

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

WKT2

VERTCRS["Santa_Cruz_da_Graciosa_height", 
	VDATUM["Santa_Cruz_da_Graciosa"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "6183"]]

Data from @esri/proj-codes

{
  "wkid": 6183,
  "latestWkid": 6183,
  "macro": "PE_VCS_SANTA_CRUZ_DA_GRACIOSA_HT",
  "name": "Santa_Cruz_da_Graciosa_height",
  "wkt": "VERTCS[\"Santa_Cruz_da_Graciosa_height\",VDATUM[\"Santa_Cruz_da_Graciosa\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Santa_Cruz_da_Graciosa_height\",VDATUM[\"Santa_Cruz_da_Graciosa\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"6183\"]]",
  "description": "Santa Cruz da Graciosa height",
  "authority": "EPSG",
  "version": "8.2(10.2.1)",
  "deprecated": "no",
  "areaname": "Portugal - Azores C - Graciosa onshore",
  "extent": {
    "slat": 38.97,
    "nlat": 39.14,
    "llon": -28.13,
    "rlon": -27.88
  }
}