GaryG,
Thanks for the reply. My Turnbull does not have the border hammer. Checkered yes, with a border at the bottom, but no border all the way around like on my Government Series Artillery model. The Government Series has all the things you described for the original pre-war plus all the US and HN stamps.
My Turnbull I guess is a Premium Single Action with the Old Armory Blue. I think Turnbull calls it Carbona Blue, but it looks the same as the Old Armory Blue USFA used. I would assume they are both done by the same bluing method.