What Is the Value of a G Stamp?
Starting with the postal rate increase that began in January 1995, the U.S. Postal Service issued several nondenominated stamps with the marking "G." The value for the first class mail version was 32 cents. They were used until the next rate change in 1998.
The stamp showed a waving flag, the letter "G" and one of three notations. The For U.S. Addresses Only notation was used on first class mail against a white background. First-Class Presort was a 25-cent stamp for bulk mailers that used a light blue background. The Postcard Rate stamp was only for postcards, cost 20 cents and appeared on a yellow background. There was a stylized dove stamp marked as "The 'G' Rate make-up stamp" priced at 3 cents, according to the Sun Sentinel.