We're told: It has been on all the Leica M series up to the current Leica M7.
I suppose we should read something about the M8. I'm vaguely aware that this adds some minor complication, a bar code or similar. But I know very little about the M8 (mostly that it's at least three times the maximum price at which it might interest me). -- Hoary 02:41, 15 February 2007 (EST)