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The long and short of it is that its a Wrangler X with a trim package for collectors and WWII buffs, not a whole lot different than a normal wrangler except for the few things that come factory that most people change anyways. Quick question, are you sure its an actual Willy's edition or did someone just put a Willy's sticker on it?
Heres part of an article from truck trend:
Designed for collectors, veterans, and outdoor adventurers, the new version of the Jeep Wrangler Willys comes in Moss Green, with dark-green Styled Steel wheels with black inserts, and super-tough dark-green rockrails borrowed from the Wrangler Rubicon.
Its warrior heart is Jeep's 4.0-liter Powertech I-6 engine, with a five-speed manual transmission and heavy-duty Quadra-Coil suspension. Standard issue is Jeep's Command-Trac four-wheel-drive system and plenty of ground clearance along with healthy approach, departure, and breakover angles, whether you're a weekend warrior or have the soul of a GI.
Included with the Willys option package (coded ASY) is a Willys decal for the front, body-colored fender flares, dual tow hooks, foglamps, full-size spare with matching wheel, removable metal half-doors and fold-down windshield, AM/FM stereo with CD player and seven speakers, and subwoofer in the locking center console, which has four cupholders. The package also comes with water-resistant camouflage seating, weather-resistant electronics, and a dark-green soft-top.
Read more: 2005 Jeep TJ Willys - First Look & Road Test Review - Truck Trend