Yup!, the general details on the bike indicates it is a Davidson. The very glossy paint (Most likely Dupont Imron) is also what Davidson used.
​​​It just does not have the pantographs on the fork crown and seat stay caps that other model Davidsons have.
My 1983 Davidson Signature has a portecatena drive side rear DO.
I think that was the last year they used the portecatena dropouts.