Australia Scott #1841 With Mauve Wash

I was going through some Australian stamps from year 2000 and came across two copies of Scott #1841. $1.50 Tourist Attractions stamp.
One of the stamps appears to have a faint mauve coloured wash over all but the left hand white on blue band. I tried scanning but the scan does not highlight what I see with the naked eye. The back of the stamp is white so this is not a case of bleed through from a coloured envelope. I'm hoping an Australian 'specialist' might be able to give me a clue about the odd colouring; it is quite obvious when you see a 'normal' stamp beside the odd one.

rrogers

Can you give us a picture to see because I have no idea what Scott #1841 is ,I can't think of anyone in Aust that uses Scott Cat.

Hi Aussie Al
Well I deleted the scan because it did not show the difference that I could see with my eyes.
The stamp in question is $1.50 Sydney Harbour Bridge issued June 20, 2000 Tourist Attractions.
Thanks
Randy