Any red flags on this 1903?

[Hesalite]

Any idea why they marked them as such? Who used them?

Information

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[RCS]

Both USMC and USN often used the name of the ship or the hull number to mark weapons and equipment during the pre WW2 days


19 Oct 1938 all USMC rifles USS Honolulu

300934
304221
896294
1023153