Private collection
1991 – (en) Thick "50", straight "9" in date
Private collection
1992 – (en) Thin "50", straight "9" in date
Private collection
1993 – (en) Thin "50", rounded "9" in date
Private collection
1994 – (en) Thin "50", rounded "9" in date
Private collection
1995 – (en) Thin "50", rounded "9" in date