Thanks Louis for the compliment. I am a bit of a newbie to rifle restoration, but like all things in life, patience is the most important thing and one must take your time. I also redone my MS1924 8x60S. Will post pics in a new post.
My M1903 was manufactured in 1924. See photo below.

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If im correct date is the "24" after the serial nr?
Maybe Kundae or Brian can help with more info on all the proof marks?