I have one almost the same but it’s a barcley custom R-360
Are you referring to the guitar that is pictured or both models mentioned? With that I don’t know what a trussrod is or anything else I am not very familiar with guitars and terminology.That trussrod nameplate means early Japanese afaik. Lie 1968-72. I’ve had a few of them. Amazing guitars. (The ones I had). Both degas guitars.