I don't know, really. But as Mr. Trotter's narrative explains, it was the first of three runs, and the early product of an inter-family competition involving the legendary tote-goat. Moreover the first picture
@Richard Trotter posted looks like the same red as yours. I'm thinking that could be a real hit at the next tote-goat meet-up. Especially if you only gently cleaned it up and got it running. But by all means, recover the seat to look more original. But what do I know? These little ponies could be a dime a dozen?