Great forum. Just wanted to introduce myself, I regularly wear my 6900 but my dad just found the first watch he ever gave me back in '86, a dw-5400 240 model, gold button edition. The bezel was gone and I was missing one golden screw, and one of the bands was breaking apart. But there was the original gold buckle.
I ordered a new band with a silver buckle, and put in a new battery, cr2016, using the duct tape method, and everything, including light and alarm, are running well.
Here's a pic of it with new band if I can upload this pic right. No one would have an extra gold screw would they? I couldn't find them in google or ebay.