There's a 1968 XLCH on Craigslist that has stars at the front and rear of the serial number. I think there was a recent posting about a similar bike (or maybe it was about this bike?) Did we ever come to a conclusion about the stars? This is a pretty nice looking bike.
I noticed Dave Carleton's 1968 XLCH in our Gallery section has the Trim Strips on the oil tank. These were available in 1968 and 1969, perhaps later too. Dave - were these an accessory, or did all bikes comes with them?