Seems to have been common on a lot of the earlier recoil-start engines. My guess is that's because good strong flexible nylon starter coard wasn't around then. They had what...............hemp and cotton rope to work with? That's not up to the task methinks.
My guess (here I go again) is that "11468" is just the manufacturer's part number for that bar. Since it has the "3063" coding on it, I'm also guessing you have a Cannon RN bar. My 31" Mac mount Cannon RN has "3163" and my Homelite mount 30" Cannon RN has "3063" on it.
If nobody answers your DL count question by tomorrow afternoon, I'll dig out the XP1020 and count the drivers on that 3063 bar. Should be the same for your Mac bar, as large frame Homelite and McCulloch bars usualy used the same DL counts. Too late for me to do it tonight. Man day shift stinks. I'm taking a couple of hours off in the afternoon to try and beat the traffic home. Should give me some time to count drivers for my friend Charles...