disgustedtaxpayer - the 1917 rate increase from $0.02 to $0.03 was rolled back to $0.02 in 1919, after the war ended. It went back up to $0.03 in 1932, which was $0.39 in current terms. The 1919 price change was the only time in history after the one ounce flat rate was established in 1885 that the face value of first-class postage went down.
disgustedtaxpayer - the 1917 rate increase from $0.02 to $0.03 was rolled back to $0.02 in 1919, after the war ended. It went back up to $0.03 in 1932, which was $0.39 in current terms. The 1919 price change was the only time in history after the one ounce flat rate was established in 1885 that the face value of first-class postage went down.