{"product_id":"twsbi-diamond-580-rbt-special-edition-fountain-pen-steel-extra-fine-nib","title":"TWSBI Diamond 580 RBT Special Edition Fountain Pen Steel Extra Fine Nib","description":"\u003cp\u003eThis is a pre-owned yet pristine TWSBI Diamond 580 RBT Special Edition Fountain Pen with a Steel Extra Fine Nib.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003eThe TWSBI Diamond 580 RBT Special Edition is a meticulously crafted fountain pen designed for discerning writers and collectors. This pre-owned example remains in pristine condition, offering exceptional value for those seeking a reliable daily writer or display piece.\n\nThe Diamond 580 RBT features a demonstrator design with a transparent barrel that showcases the internal mechanics and ink flow—a hallmark of TWSBI's engineering philosophy. The steel extra fine nib delivers precise, controlled lines ideal for detailed writing, note-taking, and correspondence.\n\nBuilt with TWSBI's signature piston-fill mechanism, this pen offers substantial ink capacity and smooth, consistent performance. The robust construction and thoughtful ergonomics make it comfortable for extended writing sessions. The Special Edition designation reflects its refined aesthetics and limited availability, making it a standout addition to any pen collection.\n\nCondition: Pre-owned, pristine. Ready to write or display.","brand":"TWSBI","offers":[{"title":"Default Title","offer_id":51514044416140,"sku":null,"price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0599\/1461\/6972\/files\/20260721_133027.jpg?v=1784657586","url":"https:\/\/pensgiftsandmore.com\/products\/twsbi-diamond-580-rbt-special-edition-fountain-pen-steel-extra-fine-nib","provider":"Happy Hour Pens And Gifts","version":"1.0","type":"link"}