Wonder Colour Gauge

The Wonder Color Gauge was developed to provide philatelists with a dependable, convenient and accurate standard of comparison of the many colours referred to in stamp catalogues, with their various shades and tints, in which stamps are printed. Many stamp collectors have difficulty in properly identifying different shades of stamps, and the Wonder Color Gauge now properly classifies 140 shades and colors, covering most of the range of colours that have been generally used in the printing of postage stamps throughout the world.