The JBM20 is based on the RGA series. It was introduced in 2016 as a mass-market version of Bowen's original signature guitar, the PrestigeJBM100.
The JBM20 features a mahogany body with a maple top bolted to a maple Wizard III neck with a 24-fret bound rosewood fingerboard with a special crescent moon inlay at the 12th fret. Components include an Edge II double locking tremolo bridge, dual DiMarzio Titan humbucking pickups controlled by a 5-way selector, a locking nut and locking Gotoh machineheads.
Differences from the JBM100 include the bridge, neck and fingerboard wood species and tuning machines, but the body style with reversed headstock, finish and signature DiMarzio pickups are retained.
The JBM27 is a seven-string version of this guitar.