hi,
i hope its the right forum. i have a "diamond" les paul dc (shortscale) bass - no "aria" written on it though. neckplate says japan, and "steel adjustable neck". has a gibson open book headstock. i searched all the net about infos about the bass but found nothing. even no other les paul dc copy by any japan manufactuer. its probably the best sounding and playing bass i ever owned. the luthier took his time with the crafting (neck,frets etc.).
maybe this was a one of a kind show model? thank you for any help!