It is impossible to tell but if we assume it is gilt and we look at the
shape of the coronet it looks more like a Bart than 67-68 meters first
because the coronet is not short and stout but skinny and tall. But if you observe the position of the FT on a bart it is not the same as the one in the ad. In the ad they are uneven ft.
Again it is hard to distinguish in the picture.
What you can say generally is that a 1963 gilt dial is a swiss only or a double swiss only but not swiss - t<25.
Below is a 5513 purported to be from 1967. Observe the crown.


