Bike-Ninja, it is not a Centurion. I've got a database with dozens of Centurion serial numbers and that format does bot show up. However, does match the format for Merida, the company that built the Japanese Raleigh frames. BTW, it is a 1983 model. Original price about $400 US.

The Windsor association is via the distributor who's name was Windsor Enterprises. There is no association with the Windsor bicycle brand. Windsor was in National City, CA. Not sure if this is close to San Diego or not.