I have leather oil that I purchased FROM hermes myself: its called Baume Renovant for use on saddle leathers...............it is an Hermes product wth their name and logo on the can. I have used this on my box leather and porc bags
that's one of my favorite products -- doesn't it smell divine?? like freshly baled hay.
here are some pics of the whole hermes leather care line, with the exception of the saddle soap which is a jumbo glycerine bar.
the tall can contains oil -- "huile pour sellerie" -- that i use on barenia and veau naturel. since these are saddle leathers i treat them like a saddle, which means a good oiling when new and then only once or twice a year. i use this on both sides of the leather if it's not lined, with a heavier application on the rough side. this stuff is particularly good for reconditioning barenia -- i have a couple barenia bags that i found used on ebay, and they looked a little rough when they arrived. a light oiling and a lot of elbow grease made them shine. literally -- it did wonders for the patina.
the short can is the baum renovant, which is a fabulous conditioner. i use it every couple months with a tack sponge on the saddle leathers -- the consistency is thicker (about like crisco in the can), but it gives a lighter conditioning than the oil.
then there's the 'lait nettoyant' which i think means cleansing milk, though it's really more of a conditioner than a cleanser. it seems to lift the surface dirt and gives a light conditioning. it's lighter than the oil and the baum, and i find it to be perfect on box leather and my croc malette. it's also great for keeping your shoes looking spiffy.
i got these when i got my hermes saddle, and have found that they're the best products on the market -- so i use them on my shoes and bags as well. i don't really have a schedule -- i just go by how they look or feel. too much conditioning or cleaning is not good, so i use them all very infrequently.