There is a Honeymoon Special video on youtube.
https://www.youtube.com/watch?v=V1mvcZzIAis
The tension bar at the top of the machine is angled differently than most tension bars. That may be what makes it look altered. The one featured in theyoutube has that strange angle, too. I hope your case works the same way the one in the video works. What a great find! Enjoy your new treasure!