Hello, I am looking for information on a ladies Centurion Le Mans I have. I'm guessing it was manufactured circa 1978? Its serial # M6D00056... Also, I'm wondering if they came standard with a bell, it has a bell with a flag of the United States painted on the top, in some internet-based research I noticed a very similar bike for sale on EBAY in Australia--the bike seemed to have the same bell, only with an Australian flag on it.