RCBS H5 press adapter

I have come across an old H5 press, which is all I can see written on the handle. I am trying to find an adapter that will fit on the press to accept the punch from a Lee resizing kit. Would anybody know what I am looking for? I think it is a shellholder adapter for H Model press as shown in Midway USA's catalog, but the nut on the adapter shown makes me second guess this one. Can anyone help?