Number group Earliest date known Front design Designator ------------------------------------------------------------------------------------ 40,000,001 November 2006 Handy Hints (Bus) T-b1 to T-b4 to 40,100,000 40,100,001 November 2006 Handy Hints (Bus) T-b1 to T-b4 to and T-c1 to T-c4 40,200,000 40,200,001 October 2006 Handy Hints (Bus) T-c1 to T-c4 to 40,300,000 40,300,001 October 2006 Handy Hints (Bus) T-c1 to T-c4 to and T-d1 to T-d4 40,400,000 40,400,001 November 2006 Handy Hints (Bus) T-d1 to T-d4 to 40,500,000 40,500,001 October 2006 Handy Hints (Bus) T-d1 to T-d4 to 40,600,000 40,600,001 November 2006 Handy Hints (Bus) T-c4, T-d4 to 40,700,000 40,700,001 November 2006 Handy Hints (Bus) T-b4, T-c4, T-d4 to 40,780,000 ? 40,780,001 ? March 2007 Handy Hints T-a1 to T-a4 to 40,800,000 40,800,001 March 2007 Handy Hints T-a1 to T-a4 to 40,900,000 40,900,001 March 2007 Handy Hints T-a1 to T-a4 to 41,000,000