Parker Frontiers

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They are quite reliable and smooth writers. Often very wet too. They're modern and would take Parker cartridges and converters. Very lucky find indeed. The nib is gold plated.
Maybe you were meant to find this pen by fate

With that particular model, they're a slightly older generation methinks. Only recently Parker started a production of new Frontiers with different barrels and nib engravings. Nevertheless, I'm sure you can find that particular model on eBay and other shops as they're quite plentiful. According to a timeline at penhero.com, Frontiers started being produced in 1996.
Check the cap if it says "Made in UK" or "Made in USA". The USA ones are a bit older

(and tend to write finer too)