Number group		Front design		Designators		Earliest known date	
	
			--------------------------------------------------------------------------------------------

			121,000,001		Handy Hints		T-b1 to T-b4		October 2010
			   to						and T-c1 to T-c4	October 2010
			121,100,000

			121,100,001		Handy Hints		T-c1 to T-c4		October 2010
			   to						and T-d1 to T-d4	October 2010
			121,200,000

			121,200,001		Handy Hints		T-d1 to T-d4		October 2010
			   to
			121,300,000

			121,300,001		Handy Hints		T-d1 to T-d4		October 2010
			   to
			121,400,000

			121,400,001		Not yet seen
			   to
			121,500,000

			121,500,001		Not yet seen
			   to
			121,600,000

			121,600,001		Not yet seen
			   to
			121,700,000

			121,700,001		Handy Hints		T-a1 to T-a4		March 2011
			   to
			121,800,000

			121,800,001		Handy Hints		T-a1 to T-a4		March 2011
			   to
			121,900,000

			121,900,001		Handy Hints		T-b1 to T-b4		March 2011
			   to
			122,000,000