There were 5 different methods used to date Orville and Orville by Gibson guitars and two factories involved withbuilding them, so I've developed the simple chart below to assist you...*F = Factory: G, J & K beginning the serial numbers denote that is was made by the Terada factory: the "G" ink stamp means the guitar should have Gibson USA pickups, and "J" for Japanese pickups.
K stands for Kuramae, Yamano's wholesales division.
Below are some checklist items to determine if yours is real. It doesn't have the Mother of Pearl "Gibson" or crown inlay. It should also have "Made in USA" underneath the serial number.
No letter beginning the serial number = Fuji Gen Factory-built.*Y = Production Year*M = Production Month*P = Production Number In 1998, Gibson and Yamano Gakki decided to end the production of the Orville models to focus on the expanded production of the Epiphone line, which wasdesigned both for the Japan domestic market as well as exported models destined for far-off lands.
The domestic models had the Gibson open-book headstockdesign while the exported models were given the usual Epiphone design.
If you’re concerned with an instrument being an “all original” vintage collectible, the number of changed parts can greatly affect it’s value.
Once you see one replaced part, there could be more, so keep looking…