Don't be fooled by its humble looks—the Platinum Preppy is an extraordinarily inexpensive yet high quality pen. We explain its special design, how to fill it with ink, and profile each version of this popular pen.

I was looking into it after I posted a question earlier, and found this very thorough description of the Platinum Preppy line of products. Much better presentation compared to the Platinum website or the Platinum US distributor website (which has information about a different product line on the preppy page).