Dating an ibanez acoustic guitar
CSL was a brand name managed by Charles Summerfield Ltd England.
Maurice Summerfield of the Charles Summerfield Ltd company contributed some design ideas to Hoshino Gakki and also imported Ibanez and CSL guitars into the UK from 1964 to 1987.
The Greco versions were sold in Japan and the Ibanez versions were sold outside Japan.
From 1982, Ibanez guitars have also been sold in Japan as well.
The first two digits represent the number of years from 1962 (1962 51 = 2013). The last four is the sequential number from all guitars made that month.
In these eight-digit numbers, the first two digits signify the number of years since Takamine’s establishment in 1962.
The following two digits denote the month, and the remaining four digits denote the instrument’s sequential number of manufacture among all the instruments made during the month indicated.
Japanese-built Takamine Pro Series guitars can be reliably dated from the eight-digit serial numbers typically found at the neck block inside the instruments.
The first two digits designate the year of manufacture, followed by two digits denoting the month.
Guitar brands such as Antoria and Mann shared some Ibanez guitar designs.