Question on 2006 white multicolor sarah wallet

Thank you for your reply.
Since today, I was trying to clean the coin pocket inside of my wallet using leather cleaning milk, dirt are very easy to be removed and there is no color changes at all.
Usually my speedy handles changes color immediate after I clean them.


So I am so confused.
Thanks again, and I think MC Sarah is a very very beautiful wallet, even after 8 years of using, still looks like new.








I had a white mc Sarah from around that time period---the interior was not vachetta leather so it never turned color.