S-JTSK-05 - ESRI:115796

WKT

VERTCS["S_JTSK/05", 
	DATUM["D_S_JTSK_05", 
		SPHEROID["Bessel_1841", 6377397.155, 299.1528128]], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["S_JTSK/05", 
	DATUM["D_S_JTSK_05", 
		ELLIPSOID["Bessel_1841", 6377397.155, 299.1528128]], 
	CS[vertical, 1], 
	AXIS["Ellipsoidal height (h)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["Esri", "115796"]]

Data from @esri/proj-codes

{
  "wkid": 115796,
  "latestWkid": 115796,
  "macro": "PE_VCS_S_JTSK_05",
  "name": "S_JTSK/05",
  "wkt": "VERTCS[\"S_JTSK/05\",DATUM[\"D_S_JTSK_05\",SPHEROID[\"Bessel_1841\",6377397.155,299.1528128]],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"S_JTSK/05\",DATUM[\"D_S_JTSK_05\",ELLIPSOID[\"Bessel_1841\",6377397.155,299.1528128]],CS[vertical,1],AXIS[\"Ellipsoidal height (h)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"Esri\",\"115796\"]]",
  "description": "S-JTSK-05",
  "authority": "Esri",
  "version": "10.4.0",
  "deprecated": "no",
  "areaname": "Czechia",
  "extent": {
    "slat": 48.58,
    "nlat": 51.06,
    "llon": 12.09,
    "rlon": 18.86
  }
}