Number group Earliest date known Front design Designator -------------------------------------------------------------------------------- 30,000,001 December 2005 Handy Hints T-a1 to T-a4 to 30,100,000 30,100,001 December 2005 Handy Hints T-a1 to T-a4 to 30,200,000 30,200,001 December 2005 Handy Hints T-a1 to T-a4 to 30,300,000 30,300,001 December 2005 Handy Hints T-a1 to T-a4 to 30,340,000? 30,340,001? February 2006 Handy Hints T-b1 to T-b4 to 30,400,000 30,400,001 February 2006 Handy Hints T-b1 to T-b4 to 30,500,000 30,500,001 February 2006 Handy Hints T-b1 to T-b4 to 30,600,000 30,600,001 February 2006 Handy Hints T-b1 to T-b4 to 30,700,000 30,700,001 February 2006 Handy Hints T-b1 to T-b4 to 30,800,000 30,800,001 March 2006 Handy Hints T-b1 to T-b4 to 30,820,000? 30,820,001? December 2005 Handy Hints T-c1 to T-c4 to 30,900,000 30,900,001 January 2006 Handy Hints T-c1 to T-c4 to 31,000,000