The Aria 783 was a hollow bodied bass made by Matsumoku in the late 1960s. The 783 had a trapeze trail-piece with wooden insert and a bridge with mute option. In 1971 this bass was renamed/replaced by the identical 5120 model. Aria described the ES-335 shaped 783 bass as follows in their 1969 catalog:

"A beautiful thin body, shaded sunburst finish. Long tapered neck, adjustable, steel reinforced. Bound rosewood fingerboard, pearl position markers. Two pick-ups, each with individual string controls. All edges bound, including "F" holes. Tone and volume controls for each pick-up. Finest chrome plated machine heads, heavy duty guard plate."

Source: Aria 1969 catalog