St Johns Bay men's brown leather coat jacket extra large XL

Vintage (about 20 yrs old most time spend stored in closet) lightly used clean smoke free St Johns Bay men's leather jacket size XL. It's not smooth leather and it's not as textured as suede, not sure if this is nubuck but it is leather. It doesn't have any rips or stains. The arms have light marks on the back side,. Certain most can be cleaned off and look good as new, I'm just afraid of using the wrong product. Otherwise there are some small marks here and there. The inside lining has game birds like pheasants, mallards and quail. It's a really nice jacket. I have a hard time reading the tag on the inside, it definitely says St Johns Bay, I can't make out the fine print above it.