Number group Earliest known date Front design Designator ------------------------------------------------------------------------------------ 49,000,001 December 2007 Handy Hints T-b1 to T-b4 to 49,100,000 49,100,001 November 2007 ? Handy Hints T-a1 to T-a4 to 49,200,000 49,200,001 November 2007 Handy Hints T-a1 to T-a4 to 49,300,000 49,300,001 November 2007 ? Handy Hints T-a1 to T-a4 to 49,400,000 49,400,001 November 2007 ? Handy Hints T-a1 to T-a4 to 49,500,000 49,500,001 December 2007 Handy Hints T-a1 to T-a4 to 49,600,000 49,600,001 November 2007 ? Handy Hints T-a1 to T-a4 to and T-d1 to T-d4 49,700,000 49,700,001 December 2007 Handy Hints T-d1 to T-d4 to 49,800,000 49,800,001 November 2007 ? Handy Hints T-d1 to T-d4 to and T-c1 to T-c4 49,900,000 49,900,001 November 2007 ? Handy Hints T-c1 to T-c4 to 50,000,000