EPSG:4181 — LUREF

GEOGCRS[
    "LUREF",
    DATUM[
        "Luxembourg Reference Frame",
        ELLIPSOID[
            "International 1924",
            6378388,
            297,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7022]
        ],
        ID["EPSG",6181]
    ],
    CS[ellipsoidal,2,ID["EPSG",6422]],
    AXIS["Geodetic latitude (Lat)",north],
    AXIS["Geodetic longitude (Lon)",east],
    ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
    ID["EPSG",4181]
]

+proj=longlat +ellps=intl +no_defs +type=crs

proj4.defs("EPSG:4181", "+proj=longlat +ellps=intl +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 4181,
  "name": "LUREF",
  "kind": "geographic 2D",
  "area": "Luxembourg",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    49.44,
    5.73,
    50.19,
    6.53
  ],
  "proj4": "+proj=longlat +ellps=intl +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4181, 'EPSG', 4181, '+proj=longlat +ellps=intl +no_defs +type=crs', 'GEOGCS["LUREF",DATUM["Luxembourg_Reference_Frame",SPHEROID["International 1924",6378388,297,AUTHORITY["EPSG","7022"]],AUTHORITY["EPSG","6181"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4181"]]');

PROJECTION
  "+proj=longlat"
  "+ellps=intl"
  "+no_defs"
  "+type=crs"
END

4181=GEOGCS["LUREF",DATUM["Luxembourg_Reference_Frame",SPHEROID["International 1924",6378388,297,AUTHORITY["EPSG","7022"]],AUTHORITY["EPSG","6181"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4181"]]