This is what Gibson say about the ES-339:
A Timeless Classic Reimagined
The Gibson ES-339 blends modern craftsmanship with vintage appeal, offering the iconic sound and aesthetic of the ES-335 in a more compact, lightweight design. Featuring a pearloid dot inlay on a rosewood fingerboard and a hand-rolled Rounded "C" mahogany neck, it pays homage to the guitar’s legendary roots. The 57 / 57 Classic+ humbuckers, combined with a hand-wired tone circuit, deliver the signature Gibson ES sound that musicians have loved for over six decades. Enhanced tuning stability and flawless intonation come courtesy of Grover Rotomatic tuners with Kidney buttons, paired with a lightweight Aluminum ABR-1 bridge and Stop Bar tailpiece. Available in stunning gloss finishes, including Cherry and Trans Ebony.