Some of my A7750's are quite loud so maybe it's normal for the watch. If you're keeping it why not get it serviced and AR coated at the same time. It would make the world of difference and really make the dial pop.
It is indeed a wealth of knowledge. It also has some of the best members on the interweb. Plenty of people who will assist even with the most basic questions; to point newbies to the correct path to "repeousness".
If I remember correctly it is part of the dial.
This is my white one that's been built by Micky.
I have a pre 2008 gen dial at home if you need it. It is aged so would need a relume to make the best of it. PM me if I can help. Oh, and good pick up with this one.
My new favourite just in from a Micky build. A Seamaster Pro case with a 2230 dial, PO bezel and insert. If I may say so, Profsteve's crystal disappears and Matej's relume make this even nicer than a gen.