<a href="http://s16.photobucket.com/albums/b40/txpd/boss%20rebuild/?action=view&current=IMG_5969.jpg" target="_blank"><img src="http://i16.photobucket.com/albums/b40/txpd/boss%20rebuild/IMG_5969.jpg" border="0" alt="Photobucket"></a>

Your link didn't appear to work, I think I found your photo. The below link should take others to the photo.

I only could find a photo of the face, a photo of the movement is needed for anyone to provide information.

http://i16.photobucket.com/alb...rebuild/IMG_5969.jpg

that would mean taking the back off?

Hi Ron: Yes ,and I'm pretty sure it screws off. If it's tight one of those rubber jar lid pads work great to get a grip on the back for turning