Yup, it's a Raysport.
CC Bicycle Gallery: Jay Blankenbiller's 1975 Raysport Super Corsa
Same R on that one. Same elements too.
More info:
http://www.cyclofiend.com/cc/2005/cc...port_info.html
"
These are essentially a quite nice Cinelli Super Corsa copy from Mexico from about 1975, but with a tighter wheelbase, and vertical Campy rear dropouts. Very responsive but comfortable frames (steel is real!), no eyelets on the dropouts, not for wide tires, fenders, or 'touring.'"