Extremely rare genuine antique Letter Opener commissioned by American Company, "Armco International Corporation", producers of Ingot Iron.I have used the words "extremely rare", based purely on the fact that after conducting extensive research, I was only able to find one other Letter Opener like it on Worthpoint which sold in 2012, so potentially a very rare find indeed.The Letter Opener is fit for purpose, around 100 years old, measures 19.5cm long, and in good antiquated condition w...ith great patina. I can only assume that the Letter Opener may be made from Armco's own Ingot Iron. I do not want to polish the item as it will ruin the patina, but I feel it may be brass or have a brass overlay based on the brown areas visible.