This may help to date the guitar,at least within a range of years.
"CBS Masterworks
Profile: CBS Masterworks Records was a subsidiary of CBS Records. In 1927, Columbia Masterworks Records was founded under Columbia Records, but renamed to CBS Masterworks Records in 1980.
When Sony bought CBS in 1987, CBS Masterworks Records was renamed to Sony Classical Records in 1990.
Since CBS started using CBS Masterworks as a name for a line of recordings in 1980, and they got out of the instrument business in 1985 when they sold Fender, then perhaps these guitars can be dated to sometime in that period.