The Twelve-cent Prexie
Third class use
From the beginning of the Prexie period until January 1, 1949 third-class items were charged one-and-one-half cents per two ounces up to the third-class limit of eight ounces. The maximum third-class charge thus would have been six cents. From January1, 1949 to August 1, 1958 there was no combination of rates and weight (eight ounces and under) that could produce a third-class charge as high as twelve cents, so the package must have been sent after August 1, 1958 when the third class weight limit went up to 16 ounces.
There was no standard fourth class rate to Zone 8 as low as twelve cents during the Prexie period.