Well, assuming that you're talking about a Pre-A 004, I agree with what has been said above.
The pre-A 004 uses the same dial as the 203/A, just with the addition of "T-Swiss-T" printing below the 6.
If you're talking about an A series 004, this would have the thinner indices/numbers with the more rounded 6, instead of the more squared-off 6 of the Pre-V and Pre-A watches and would have "T Swiss T" printing.
If you're talking B series 004, that would most likely be a Luminova dial, instead of tritium, with the same skinny indices/numbers like the A series dials.
Movement decorations are different, but that's pretty much just down to the decoration of the bridges and all of these were long before the swan-neck regulators were ever involved.