According to a post in the old bikelist archives, Alan Goldsmith also had a deal with Centurion whereby some Centurion models were branded as Niko and sold through Bikecology, presumably at a lower price point. There is a Bikecology catalog c. 1978 on the Bulgier.net site and another from 1980
here if anyone wants to do comparisons.
We had a late 70s Niko mixte that was the spitting image of a Centurion LeMans of the same time, even down to the same typeface in the logo.
BTW: While I was at a workshop this afternoon, some schmoe out in Chicago's western burbs put up a 'Centurion bike' for sale on CL for $50. It was an Ironman Expert, and long gone before I emailed about it. Not my size so...I hope someone from this gang got it!
Edit to add: Here's that little Niko 'Mystere' mixte. It wasn't that special a bike but my daughter loved it--should have given it more than a cable lock.