http://i300.photobucket.com/albums/n...oh/photo-6.jpg
From pictures, it looks like it’s a Bicast, but…not conclusive until verified.
Will need more pictures to verify the leather types, including if possible the reverse and the edges; including overall pictures of the entire set. Nail scratching may give some clues to the leather types too especially to the Pull-up. When leather color lightens when pull will indicate it is the Pull-up type. Absorbency water droplet test will differentiate between the Bicast from the other two.
Here are fixes that matches the original leather type.
If this is “Aniline” leather, just use Topcoat-79G to test it out with a cotton swab to darken it; the color will bounce back when dry.
If this is “Aniline Wax Pull-up” leather, use Wax Effect-8.6 to test it out with a cotton swab to darken it, when dry white wax crystalline will appear; and need a hot blower like hair dryer to activate the shine.
If this is “Bicast” leather none of the above works on the color, need to have the color touch up with matching “opaque” pigment-64 to block out the base color follows with “transparent” matching Bicast Dye-76 (Antique Brown) to bring out the depth; thereafter topcoat with Bicast Topcoat-66G to blend in the luster.