Rust blue is more beautiful... Salt bluing in my opinion is more durable... but that is a subjective thing. The change from rust to salt bluing was made as a wartime expedient in manufacturing in mid 1937 at Mauser.
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regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
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