INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (4608, 'EPSG', 4608, '+proj=longlat +ellps=clrk66 +nadgrids=May76v20.gsb +no_defs +type=crs', 'GEOGCS["NAD27(76)",DATUM["North_American_Datum_1927_1976",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","May76v20.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4608"]]');