My Thoroughbred mare is in her early 20's. The exact year is unknown. I'm guessing she is 23 years old and what we are seeing is the top part of an S in her tattoo. I really need some help her reading this tattoo. Identifying this mare is the key to also identifying the Oldenburg mare that came with her. Plus, I'd very much like to know both of their histories. I've tried darkening the picture, but I think I'm just not skilled at reading these faded ones.