Letter Opener Celtic Rope Pewter. This is a very striking Pewter Letter Opener with a plain blade. The Letter Opener has a Celtic Rope pattern on the Handle with a Celtic Knot seal at the top. The Pewter Letter Opener measures approx 18 – 19cm long and is made by British craftsmen. The Celtic Letter Opener is presented in a dark blue leatherette box on a velveteen pad. The Letter Opener could be engraved along the blade.