The product is a rare vintage Sheaffer's ballpoint pen refill cartridge from the 1950s, featuring a sterling silver writing tip in a beautiful blue ink color. Made in the United States, this collectible cartridge is a unique and sought-after piece for pen enthusiasts and collectors alike. The combination of the luxurious sterling silver tip and the vibrant blue ink make this Sheaffer's piece a standout addition to any collection.
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