Thanks for posting the excellent link.There's a great essay about the Dynamic (and what to look for) by an expert Omega collector here. (PDF is linked to in the last paragraph).
It does have a section about what to look for in terms of dial text and I found it quite useful. I love the Dynamic, and I believe mine is legit. If you bide your time, good ones do crop up on from time to time, and sometimes at very reasonable prices! Good luck.