Joe, it looks like wonderful tone splits there. That thing really sings! I would not worry about the splotch if it is not on the original. I know you want to present your best to people, but I totally understand because if somebody gave me a photoshop program I would find a way to stick myself in the thumb. Really sweet print you have there.
Thanks Rich! I admit there was an impulse for me to clean it up in photoshop, but I think even though this is a poor scan it's a truer representation of the piece.