Hi
Got any pictures?
And what's on the forks stem?
If I remember correctly the Senior Pro was the best DB at the time and pre Turbo. The Turbo took the SP's place when released.
My brother had one in the early 80's and they are quite a large bike. It also has an upright seat post (like the Turbo), and they are looptails.
I'm guessing yes....
PS - I also got a DB today
J.