I had forgotten about the free/bonus Stablemate in the Premier Club until I saw others appear on Instagram. Mine arrived earlier this week, so here are a few photos of him.
Charleston is a brand new mold sculpted by Laura Skillern Sailer.
He is such a cute horse!
Like previous PC stablemates, he is a mini-me of one of the releases. He shares the same pattern as Hamilton:
I’m not really a Stablemate collector, but I’ll enjoy this guy for a while longer. ❤️
Desktop Stables 
I like his creepy eyes.