The adoption of decimal currency brought with it a need for new stamps.
There are distinctive shades of the 1c and 6c values.
1c Prince of Wales, later King Edward VII. On the original the letters "N" and "F" are farther from the scroll than on the re-engraved. On the original the scroll cuts into the top of the inner oval frame and the numbers "1" at the bottom are squat, while on the re-engraved the scroll does not break the frame and the numbers "1" are taller. The re-engraved has more brown in the color.
2c cod.
5c seal on ice floe.
10c Prince Albert, husband of Queen Victoria.
3c, 6c, 12c and 24c Queen Victoria.
On the middle image the tip of the Queen's nose appears to be missing (the so called "nose bob" or "scar on nose" variety), while on the right image a scratch on the printing plate appears (the so called "chin strap" or "strap under chin" variety). The reddish color of the center stamp was used in the original 1865 printing, while the darker color was used in 1880 when the stamp was re-issued.
13c sailing ship.