Unfortunately, the only way to get a good vintage Sub is to make 1
I know of no pre-assembled reps that do not contain numerous & glaring mistakes (yours is a prime example). Remember, too, that these early Subs had very low-profile (thin) cases & most reps use standard (thicker) Sub cases. You can get a general idea whether it is in the ball park by viewing your watch from the crown side. From this angle, the edges of the crown should extend beyond the top & bottom perimeters of the case (this, however, assumes that your rep was fitted with the correct 6mm crown & not a modern 7mm)
(This is a GMT, but the case dimensions relative to the crown are similar to an early Sub)
And if you do decide to try to improve the dial, you should also replace both the bezel & bezel insert, as both are wrong for an early Sub. I would also lose the bracelet (if it does not disintegrate in your hands 1st).