I didn't know the difference in appearances of the Challenger 604 vs Challenger 605 when I first posted my 2 pictures.
604 has the squared off section behind the tail vs the rounded of the 605.
I entered new data for N99KW, which has currently been a Challenger 605 since 2011 c/n 5877
From looking at the pictures of N99KW, there are only Challenger 605s pictured, no 604s - my first 2 pictures as well as Daniel Jef and micka2b need to be moved from 604 c/n 5564 to Challenger 605 c/n 5877