Dunedin Bluff 1960 height - ESRI:105794

WKT

VERTCS["Dunedin_Bluff_1960_height", 
	VDATUM["Dunedin_Bluff_1960"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["Dunedin_Bluff_1960_height", 
	VDATUM["Dunedin_Bluff_1960"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["Esri", "4458"]]

Data from @esri/proj-codes

{
  "wkid": 105794,
  "latestWkid": 4458,
  "macro": "PE_VCS_DUNEDIN_BLUFF_1960",
  "name": "Dunedin_Bluff_1960_height",
  "wkt": "VERTCS[\"Dunedin_Bluff_1960_height\",VDATUM[\"Dunedin_Bluff_1960\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Dunedin_Bluff_1960_height\",VDATUM[\"Dunedin_Bluff_1960\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"Esri\",\"4458\"]]",
  "description": "Dunedin Bluff 1960 height",
  "authority": "Esri",
  "version": "10.0.0",
  "deprecated": "codechange",
  "areaname": "New Zealand - South Island - Dunedin-Bluff vcrs",
  "extent": {
    "slat": -46.73,
    "nlat": -44.52,
    "llon": 166.37,
    "rlon": 169.95
  }
}