Ollo (and others),
Thanks for the info.
I've picked up the Centurion now and you are right it is a LeMans model. Yes, it has Sun Tour derailleurs and brakes.
I've been riding it around today and I'm pleased.
My only concern is the logo. From my research the Centurion logo is a large upper case "C". This one has a gold four point star with "Centurion" running vertically in red lettering.