EPSG:3906 — MGI 1901

GEOGCRS[
    "MGI 1901",
    DATUM[
        "MGI 1901",
        ELLIPSOID[
            "Bessel 1841",
            6377397.155,
            299.1528128,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7004]
        ],
        ID["EPSG",1031]
    ],
    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",3906]
]

+proj=longlat +ellps=bessel +towgs84=682,-203,480,0,0,0,0 +no_defs +type=crs

proj4.defs("EPSG:3906", "+proj=longlat +ellps=bessel +towgs84=682,-203,480,0,0,0,0 +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 3906,
  "name": "MGI 1901",
  "kind": "geographic 2D",
  "area": "Europe - former Yugoslavia onshore",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    40.85,
    13.38,
    46.88,
    23.04
  ],
  "proj4": "+proj=longlat +ellps=bessel +towgs84=682,-203,480,0,0,0,0 +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3906, 'EPSG', 3906, '+proj=longlat +ellps=bessel +towgs84=682,-203,480,0,0,0,0 +no_defs +type=crs', 'GEOGCS["MGI 1901",DATUM["MGI_1901",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[682,-203,480,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3906"]]');

PROJECTION
  "+proj=longlat"
  "+ellps=bessel"
  "+towgs84=682,-203,480,0,0,0,0"
  "+no_defs"
  "+type=crs"
END

3906=GEOGCS["MGI 1901",DATUM["MGI_1901",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[682,-203,480,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3906"]]