Springfield 1903 Mark 1 - Stampings and Original Finish Coloring?

[Alkali]

Hopefully I'm adding something useful by posting photos of my Mark I receiver. Taken in natural sunlight; unworn, original finish (hopefully) appears to be a dark, smooth charcoal grey. Only a slight olive tinge appears in the closeup photo on the upper edge.

I might add that I'm somewhat "color deficient" (red/green) in my vision and have always had problems seeing and describing slight differences in finish colorization on all kinds of 03's.