J-prefixes often appeared in the late 1960s. After 1973, rosettes (the decoration around the soundhole) generally became simpler.
On acoustic models, a paper label inside the soundhole typically lists the "Modello" (model) and occasionally a serial number. eko guitar serial number lookup 2021
Identifying the age and origin of an Eko guitar in 2021 (and beyond) requires a mix of physical inspection and understanding historical production shifts, as Eko did not always use a centralized, sequential serial number system like modern manufacturers. Where to Find the Serial Number J-prefixes often appeared in the late 1960s
For many Italian-made electric and bolt-on acoustic models (like the vintage Ranger series), the serial number is often engraved on the metal plate where the neck bolts to the body. Identifying the age and origin of an Eko
Some bass models may have numbers located under the intonation screws on the bridge. Decoding Eko Serial Numbers
Production year can also dictate hardware; for instance, NXT A100 models from 2022 onwards feature a 46mm nut, while those marked "21" or "20" have a 43mm nut. Vintage Italian Models (1959–1984)
For electric models, you can date the instrument by checking the codes on the internal potentiometers (volume/tone knobs). The digits usually follow a "Manufacturer-Year-Week" format (e.g., "1377012" would be the 12th week of 1970). Summary of Historical Eras Eko Guitars NXT A100ce Natural Acoustic Guitar