#Mercari Halloween Rare Daiwa Seiko "CARBON TESTER" engraved tie clip. A vintage item from the 1970s, limitedly distributed to testers for carbon material development. It features a silver-toned metal with a red logo in the center and engravings on the back. In good condition with almost no noticeable scratches or stains, it's a collector's item with a small existing number. Can be used as an accent for suits and jackets. In the 1970s, when carbon fiber fishing tackle began to be developed, it was distributed exclusively to testers to test the performance of the products, and the existing number is very small.