There's a lot of basic information about rehabbing unlined glove-tanned bags, like your pocket bag, at the link below. I usually use Ivory dish soap or woolite to wash my bags. I have heard of using Dawn to remove grease spots but I haven't tried it myself.
I like Leather CPR conditioner, but there are other good conditioners like Apple and Lexol.
You rub it on all the finished leather surfaces and that includes the piping. You don't rub it on the rougher suede interior surfaces.
I like to use Wenol metal polish on hardware but Brass also works well on brass.
Perhaps if you post photos of your bag we could give you more specific advice. Good luck!
http://forum.purseblog.com/coach/coach-rehab-and-rescue-club-624452-8.html#post18465269
Thank you!
The bag is in relatively good condition but the odor is so strong I'm sure it needs a good, long soaking.
Here are the pictures I posted in the authentication thread. (Thanks again Hyacinth
