Provisional South American Datum 1956 - EPSG:4248

WKT

GEOGCS["GCS_Provisional_S_American_1956", 
	DATUM["D_Provisional_S_American_1956", 
		SPHEROID["International_1924", 6378388.0, 297.0]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_Provisional_S_American_1956", 
	DATUM["D_Provisional_S_American_1956", 
		ELLIPSOID["International_1924", 6378388.0, 297.0]], 
	PRIMEM["Greenwich", 0.0], 
	CS[ellipsoidal, 2], 
	AXIS["Latitude (lat)", north, 
		ORDER[1]], 
	AXIS["Longitude (lon)", east, 
		ORDER[2]], 
	ANGLEUNIT["Degree", 0.0174532925199433], 
	ID["EPSG", "4248"]]

Data from @esri/proj-codes

{
  "wkid": 4248,
  "latestWkid": 4248,
  "macro": "PE_GCS_PSAD_1956",
  "name": "GCS_Provisional_S_American_1956",
  "wkt": "GEOGCS[\"GCS_Provisional_S_American_1956\",DATUM[\"D_Provisional_S_American_1956\",SPHEROID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_Provisional_S_American_1956\",DATUM[\"D_Provisional_S_American_1956\",ELLIPSOID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433],ID[\"EPSG\",\"4248\"]]",
  "description": "Provisional South American Datum 1956",
  "authority": "EPSG",
  "version": "6.5(3.0.1)",
  "deprecated": "no",
  "areaname": "South America - PSAD56 by country",
  "extent": {
    "slat": -43.5,
    "nlat": 12.68,
    "llon": -81.41,
    "rlon": -47.99
  }
}