Looking to purchase a 1984 raleigh SB bike. States its an actual team issue with 531c and super record. I'm confused a bit because from what I know there was a Team Replica 12 with 600 that used 531c and was top of the line for retail and the team used 753. I can't find info on a retail bike with 531c and SR. Any help or better knowledge than me chime in?