Number group Earliest date known Front design Designator ------------------------------------------------------------------------------------ 38,000,001 January 2007 Handy Hints T-c1 to T-c4 to 38,100,000 38,100,001 January 2007 Handy Hints T-c1 to T-c4 to 38,160,000 ? 38,160,001 ? January 2007 Handy Hints T-b1 to T-b4 to 38,200,000 38,200,001 January 2007 Handy Hints T-b1 to T-b4 to 38,300,000 38,300,001 January 2007 Handy Hints T-b1 to T-b4 to 38,400,000 38,400,001 February 2007 Handy Hints T-a1 to T-a4 to 38,500,000 38,500,001 January 2007 Handy Hints T-a1 to T-a4 to 38,600,000 38,600,001 January 2007 Handy Hints T-a1 to T-a4 to 38,620,000 ? 38,620,001 ? June 2006 Handy Hints (Bus) T-a1 to T-a4 to 38,700,000 38,700,001 June 2006 Handy Hints (Bus) T-a1 to T-a4 to 38,800,000 38,800,001 May 2006 Handy Hints (Bus) T-a1 to T-a4 and to T-b1 to T-b4 38,900,000 38,900,001 June 2006 Handy Hints (Bus) T-b1 to T-b4 to 39,000,000