1976A/VA
1977B/VB
1978C/VC
1979D/VD
1980E/VE
1981F/VF
1982G
1983H
1984I
1985J
1986K
1987L
1988M
1989N
1990O
1991P
1992Q
1993R
1994S
1995T/W
1996V/U
1997Z/U
1998Z/W
1999X
2000AB
2001DE
2002DT
2003AD
2004CL
2005MA
2006OP
2007EO
2008PJ
2009LT
2010RS

From 2010, similar to the case numbers, randomly generated number combinations were used as the lock code. A temporal assignment is no longer possible and is also intended.