| Serial Number | Era | Interpretation | | :--- | :--- | :--- | | C2345 | Early 70s | C-prefix, circa 1973-1975. Likely a Starline acoustic. | | 860123 | 1986 | 86 = 1986. The 123rd guitar of that year. Transition period model. | | 0105123 | 2001 | 01 = 2001. A post-millennium modern classic. | | 190315999 | 2019 | Made on March 15th, 2019. The 999th guitar in that batch. This is likely a limited run. | | A9876 | Mid 60s | A-prefix, one of the more desirable vintage eras. Check for a "Fyrbyrd" model designation. |
Usually found on the back of the headstock , though it can sometimes be difficult to see on older models.