According to the 9th edition of The Chip Rack, your chip is #V6375 - released in the year 2000 as a "souvenir" - quantity 100 - worth $30 to $39 on the collectors market (depending on condition and demand) - unless the Four Queens has publicly announced that it is no longer redeemable, the chip should still be worth face at the FQ - sounds like a private "vanity" chip released to celebrate the winner of a tournament.