In the mid-1950s, Harry Rosenbloom opened the Medley Music store outside Philadelphia.
As the Folk Music boom began in 1959, Rosenbloom decided to begin producing acoustic guitars and formed the Elger company (named after Rosenbloom's children, Ellen and Gerson).
Ibanez did not put serial numbers on their guitars. The only way to date these guitars is to find out what years they were available and then comparing all the minute details like scripts, contours, and inlay variances that only the hardcore vintage gurus know.
, This old style serial number will either be on the neck plate or impressed into the back of the headstock.
Based in Nagoya, Aichi, Japan, Hoshino Gakki were one of the first Japanese musical instrument companies to gain a significant foothold in import guitar sales in the United States and Europe, as well as the first brand of guitars to mass-produce the seven-string guitar and eight-string guitar.
In the 1960s, Rosenbloom travelled to Japan and found a number of companies that he contracted to produce the Elger acoustics.
Instruments currently produced in Japan since the early 1960s, Korea since the 1980s, and China since the early 2000s. By the mid-1960s, Hoshino was producing instruments under various trademarks such as Ibanez, Star, King´s Stone, Jamboree, and Goldentone.
The factory and offices were burned down during World War II, and were revived in 1950.
Serial numbers can be useful in determining the age of a guitar as well as in which country and by which builder it was produced.
Unfortunately, there is no single unified format used for Ibanez serial numbers.