[Fred Taylor]

If it were mine I would refinish the whole cabinet, trying to blend that in to match would be more of a challenge than doing the whole thing. Your dealing with a very old surface that has went though the wringer, Its to far gone   . If your mind is made up to just do that section I would get some extra dark walnut stain and rub it in to darken that area and let dry dull like the other side, then get some Howards restore a finish and wipe whole cabinet down ,that's my humble opinion