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