What better way to continue this thread than to find all these on Ebay... This is an example of one of the bottles that I suspect has been 'worked' over in a better way with more colour AFTER the initial 'draft' of the outline has been achieved in the bottle. The oil paint coverage turns the grey of the 'transfer' (for lack of a better name) into more 'black' and then the colors are used to give it a more complete and older look. I have some better examples that I bought early on in my novice collecting days that will rival some of the 'real' better oil painted older ones I have. This example here is signed and sealed Ye Zhong San, 1934 (or 1994). If it all dated correctly, which is at the very least doubtful or up for discussion, then the Ye Zhongsan is certainly wrong or Ye Studios... anyway... for learning, sharing, and for discussion purposes, folks...
http://cgi.ebay.com/Chinese-Hand-Inside-drawing-Snuff-Bottle-person-/380331594230?pt=Asian_Antiques&hash=item588d8791f6To the unknown and uninitiated, and to people who have chinese friends for translation, the 1934 date could be credible...a little chemical aging (yes, there are factories and workshops who do just this) to the bottle applied... and voila... anything is possible, as well as this just might be an 'older' bottle. Hard to get to the bottom of this without someone who has seen and observed my theory.