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

			90,000,001		Bus - Handy Hints	T-d1 to T-d4		October 2010
			    to						T-c1 to T-c4		September 2010
			90,100,000

			90,100,001		Not seen as yet (by 08/2011)
			    to									
			90,200,000

			90,200,001		Not seen as yet (by 08/2011)
			    to									
			90,300,000

			90,300,001		Bus - Handy Hints	T-c1 to T-c4		October 2010
			    to
			90,400,000

			90,400,001		Bus - Handy Hints	T-c1 to T-c4		October 2010
			    to
			90,500,000

			90,500,001		Bus - Handy Hints	 T-1 to T-c4		December 2010
			    to
			90,5xx,000

			90,5xx,001		Handy Hints		T-a1 to T-a4		September 2010
			    to						
			90,600,000

			90,600,001		Handy Hints		T-a1 to T-a4		August 2010
			    to						and T-b1 to T-b4	June 2011
			90,700,000

			90,700,001		Handy Hints		T-b1 to T-b4		June 2011
			    to						and T-1 to T-c4		June 2011
			90,800,000

			90,800,001		Not seen as yet (by 08/2011)
			    to 
			90,900,000

			90,900,001		Handy Hints		T-a1 to T-a4		July 2010
			    to
			91,000,000