There is a '2ND' stamp on the back of the head, but the reason for the outlet is unknown at the time of new sale. It can be used as a backing guitar for vocals and guitar, adding color to the band's sound. This model has a full acoustic construction without a center block, which gives it an acoustic body resonance even when played live.
The thin full acoustico body and P-90 pickups give it an edgy yet full sound, making it an eternally popular item that can be called a masterpiece. This model is a limited edition model equipped with a Bigsby tremolo unit by default, and is one of the rarest guitars in the world. The 'Casino' is the most famous of Epiphone's original guitars.