I have not seen anything on the unit itself, but the outer cardboard box has a sticker with a build date on it, I would surmise the serial numbers would be sequential also. You would just hope as the time in production increases problems are ironed out as with other manufactured goods. Although you may just be unlucky, I doubt they will ever admit if there has been a issue or if you only hear about it when us cry babies moan when something goes wrong.
I had another good session Monday night and it definitely feels of a more solid construction. Loving my F1 wheel actually on mods like the FR3.5 in AC.