Number group Earliest date known Front design Designator ------------------------------------------------------------------------------------ 46,000,001 November 2007 ? Handy Hints T-c1 to T-c4 to 46,100,000 46,100,001 November 2007 ? Handy Hints T-b1 to T-b4 to 46,200,000 46,200,001 November 2007 ? Handy Hints T-b1 to T-b4 to 46,300,000 46,300,001 November 2007 ? Handy Hints T-a1 to T-a4 to 46,400,000 46,400,001 November 2007 ? Handy Hints T-a1 to T-a4 to 46,500,000 46,500,001 November 2007 ? Handy Hints T-a1 to T-a4 to 46,550,000 ? 46,550,001 ? April 2007 Handy Hints (Bus) T-a1 to T-a4 to 46,600,000 46,600,001 February 2007 Handy Hints (Bus) T-a1 to T-a4 to 46,700,000 46,700,001 April 2007 Handy Hints (Bus) T-a1 to T-a4 to 46,800,000 46,800,001 March 2007 Handy Hints (Bus) T-b1 to T-b4 to 46,900,000 46,900,001 March 2007 Handy Hints (Bus) T-b1 to T-b4 to 47,000,000