A $3 Gold Princess US Gold Coin certified by NGC with a "Generic Date" designation signifies that the coin has undergone professional grading and authentication by the Numismatic Guaranty Corporation (NGC). However, the specific date of the coin within the series may vary, and it is not attributed to a particular year of production. These coins, minted from 1854 to 1889, are known for their distinctive design featuring Lady Liberty as a princess on the obverse and a wreath on the reverse. Collectors value NGC-certified coins for their quality and authentication, even when the precise date is not specified, as it offers a trusted assessment of the coin's condition and genuineness.