I remember them changing to the red in 1999..
At the end of 2009 they started being all Black with no silver with the Logo being upside down compared to the older ones & the SR is now just an R..
Just something I've noticed, also they started changing the button on them too, first they got a bit bigger then later started being a larger diameter with a flatter button with rings..
I feel lucky to have three Black/Silver Pre 1999 MKII magazines for my 1986 KMK678 that are period correct, It only came with one & have found two in the last ten months for it..