I'm trying to georeference some maps of Namibia and am having trouble. The projection stated on the map is the "Gauss Conform Central Meridian 15deg E. Bessel's Spheroid". I've tried using South African CRS : HBK_NO_15 and CAPE_NO_15 on the assumption that perhaps the "NO_15" refers to the central meridian. These are the closest I could find to the projection listed on the map.
Is this the right coordinate reference system, and if not does anyone have any idea what is?
I have also asked a related question as Upside down result when I use QGis to georeference 1977 S. African Land Survey Maps of Namibia