in-demand ! 19th C Kestner ? Rare JDK Cork Stuffed Dep 10 154 Bisque Head Antique 21"Doll

Please see all the photos for condition.  Overall she appears to be in splendid shape for the age.  The kidd leather body still has the original JDK German 1/2 Cork Stuffed label but it does have several worn spots.  Several of the metal pins holding her joints together are somewhat corroded but appear to still be holding everything in place well.  Her forearms and hands are porcelain and I don't see any damage on either one.  There are a few light colored lines under her bottom lip - I can't tell if these are hairline cracks or just some type of mark on the porcelain.  I can not feel them with a fingernail.  They are visible in the close up of the face.  
The doll measures about 21 1/2" tall.  She does not have a wig or clothing.  She is marked DEP 10.154.  She has blue sleep eyes that do still work.