Back when I rode a Brooks Pro, I took it to the shoemaker once a year or so after the winter. He was an old Italian craftsman and cleaned and polished it back to near new condition. That saddle saw over 50,000 all weather miles and still looks decent after 45 years.
In my Italian circle back then "shoemaker" was a derogatory term for a poor mechanic. So it was kind ironic that my road bike was cared for annually by a shoemaker. He was also the go to guy for cleat installations (when they were nailed on) and our shop sent all our new shoe buyers to see him.
If there's a decent shoemaker (should be at least 50 years old) around, he can probably clean it up for you. If not, the next best place to find good leather work is in the saddle (horse) trade. The only problem is that folks are used to a monied crowd and know how to charge.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.