Does anyone know how long the Parker Duofold Centennial was available with a gold cap decal with "Centennial 1888 - 1988" around the perimeter and the Parker arrow and oval logo in the center? Was this only available in 1988 or only on pens manufactured in 1988?

I would have to look it up, but I am still looking for plain Duofold decals or initials of any type for some pens that don't have any at all.