For the full story on the Green Line 4507's that were snatched away from Surface in 1947 go to 'Vintage Gallery - New York City - Green Bus Lines' (top of page 2).
For a picture of one of the buses (#942) go to the bottom of page 1.
. Looks like Green Lines was working with Surface back in 1947. That was before Surface hook up with Fifth Ave Coach. "Pipe"