So I'm loving my new Engineer II Moon Phase with the blue dial--fantastic watch and I'm getting about -0.5 seconds a day on average. However, I noticed something unusual about the dial. In every picture I've seen of the dial, including the one from Ball's own web site, the mCi indication is "T25" (first photo below). On mine, the mCi indication is just "T" (second photo below). Did Ball issue two versions of this watch with different T-ratings?