1991 - 2006 : Sri Lanka Heritage
Bradbury Wilkinson Specimens

		Pink	164x82 mm	Rs2000 note	2005-2006 Wide Security Text
		Green	157x78 mm	Rs1000 notes	1991-1994 1995-2005 (blanked emblem)
		Brown	150x75 mm	Rs 500 notes	1991-1994 1995-2005 (blanked emblem)
		Dark Brown	143x71 mm	Rs 100 notes	1991-1992
		Orange	143x71 mm	Rs 100 notes	1992-1994 1995-2006 (blanked emblem)
		Blue	136x68 mm	Rs 50 notes	1991-1994 1995-2006 (blanked emblem)
		Violet	129x64 mm	Rs 20 notes	1991-1994 1995-2006 (blanked emblem)
		Green	122x61 mm	Rs 10 notes	1991-1994 1995-2006 (blanked emblem)

The only 1992 or older Specimen issued found online had the Red oval shaped SPECIMEN NO VALUE logo of DELARUE & C^o LTD stamped on them on the upper left and lower right with large SPECIMEN diagonally upwards across on both sides in landscape orientation.
A single punch hole in the middle space used for the signatures and date.
The other Specimens scanned from the 2021 CBSL 70th Anniv Book pages 115--119 does not have this Red DeLaRue Stamp or the punch hole.
A specimen control number is stamped on the front lower left margin as SPECIMEN N^o. NNN.
Normally a bundle of 100 are printed for distribution to local Banks.
I hardly found any Sri lanka Specimen images on online Auction Archives. Maybe CBSL had more control over how they were distributed

This series comes in two varieties for all denominations except for the Rs2000 issued in 2005. First with specimen images of Rs100 and Rs500 shown above from 1991 to 1994. Second with specimen images of Rs20 Rs50, Rs500, Rs1000 and Rs2000 shown above with Blanked Symbol at center bottom from 1995 to 2006. Both types only available for Rs500 and Rs10 is not available.
If anyone has a 1991-2006 Specimens please contribute 300 dpi images to kavan @ gmail.com or WhatsApp +94712537551 to complete this page.

The specimen note images at 126+ dpi from online Auctions, and CBSL publication are displayed above at 25 dpi. I thank Owen Linzmayer, for the 1991 Rs50, and 1992 Rs1000,