Yes, H-D gives their motorclothes Part Numbers HOWEVER, most motorclothes are only in production for one year and a search of the P/N on the label generally brings up an "obsolete" response on the various H-D websites that you can plug P/N's into (Chicago H-D being the one a lot of us use) The jacket looks to me like it was made for a specific model. As a matter of fact at first I thought it was a Fatboy Jacket, but the emblem on the back has wings vice the Army Air Corps logo of the Fatboy. So what other model could it be named for ? It reminds me of something, but I can't place it. What year was the Road King introduced in ? Could it have been a Road King jacket ? If it really is that much of an issue for you, see if you find the e-mail address of the Harley-Davidson Archives and send them the pictures. I am sure they'd answer your question.
B B