I don't know much about bluing as done by Parker but I ask if anyone has seen any genuine factory/period literature put out by Parker or any other American maker that refers to niter or nitre "bluing" on triggerguards?
Again I am asking about righteous factory/period literature from any American maker - not references in books, on internet sites, or by gunsmiths. Please let me/us know what you have in the way of factory literature. Thank you.
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