LN 1902 - EPSG:5728

WKT

VERTCS["LN_1902", 
	VDATUM["Landesnivellement_1902"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["LN_1902", 
	VDATUM["Landesnivellement_1902"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "5728"]]

Data from @esri/proj-codes

{
  "wkid": 5728,
  "latestWkid": 5728,
  "macro": "PE_VCS_LN_1902",
  "name": "LN_1902",
  "wkt": "VERTCS[\"LN_1902\",VDATUM[\"Landesnivellement_1902\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"LN_1902\",VDATUM[\"Landesnivellement_1902\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"5728\"]]",
  "description": "LN 1902",
  "authority": "EPSG",
  "version": "6.7(9.3.0.0)",
  "deprecated": "no",
  "areaname": "Europe - Liechtenstein and Switzerland",
  "extent": {
    "slat": 45.81,
    "nlat": 47.81,
    "llon": 5.95,
    "rlon": 10.5
  }
}