the Lorraine scale
This little letter scale has a chart with side by side five categories of postal rates. The chart up to 16 ounces, is subdivided per half ounce. A domestic letter costs 2c per oz., this rate was valid from 1919 till 1932. A letter abroad was 5c for the first oz., every extra ounce costs 3c extra. I don't have a specification of the years in which this rate was valid. The scale is made from chromed tin. The round hole in the bottom plate is typical. Engraved at the bottom is the text: "Not legal for use in trade". Below some more pictures of this letter scale.
side of scale
