This is a model by Black Horse Ranch, you can read all about the model *here* - the model is called 'Companion' and was sculpted to go with the Hagen-Renaker 'Crusader' by Maureen Love.
This is an unpainted casting, the scale is classic, 1:12
I have plans on what colour he will be, I'll post some photos in a minute... first some of the model himself:
And a size comparison photo
Now for the colour I have chosen, he will be a Dapple Grey, which I believe is the typical colour for a Percheron. Something like this: