I saw the line that goes through Crono's head and though it was just part of the background, but I couldn't see any other clock references.. Now I can see two more sets of dashes on the left side, but I wouldn't really know that it was a clock if I hadn't been told..
Is the whole crew at the same level of transparency? Frog, Robo, Lucca, and Ayla look really opaque (except you can kinda see part of the clcok at the bottom of Ayla)