Platinum Preppy: A Comprehensive Guide | JetPens
Platinum Preppy: A Comprehensive Guide | JetPens
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).
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Not mentioned here, but you can use an adaptor to use an international style cartridge in your preppy fountain pen. It works lika a charm.
Edited. I wrote converter, but I meant to say cartridge
If I convert, I'll probably used that o-ring gasket method.