"The intersection of the top face of a 600 mm sq Stainless Steel plate and the centre of 5/8" hole. GNSS Marker"
01/05/1991 | 01/02/1992 | 01/08/1992 | 01/01/1993 | 01/02/1994 | 01/06/1995 | 01/08/1995 | 01/06/1996 | 01/09/1996 | 01/06/1997 | 01/06/1998 | 01/12/2000 | 01/01/2002 | 01/04/2003 | 01/11/2005 | 01/09/2008 | 01/10/2008 | 01/12/2008 |
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