It is on the bottom of this rooster shaped bowl and I cannot find a mark even similar to it on any sight. In his opinion it looks like a modern piece art work mark, or a personal seal for a collector's personal identification use. This rooster is very interesting and of a remarkable integrity. From the looks of it I would not rule out a late Qing dynasty date for it, and a considerably value. This information is given as an example of private conversation only and is not intended to be used as a promotion of any individual piece.
All opinions is the authors and is given as such with all hazards of judging anything from a photo.