The "0" marking on the section of the Parker 75 Sterling Silver is a feature found on the early models (flat-top) released in 1964. This older model is a rare fountain pen. It features a triangular grip that fits comfortably in the fingers and a unique, innovative mechanism that allows for fine adjustment of the nib angle by rotating it left or right to suit the writer's style. This model is a very rare fountain pen that is no longer in production. Features: Manufacturer: PARKER Model: Flat Top 0 Scale PARKER 75 Ciselè Color: Sterling silver 925 Nib: 14K Gold (585) Filling System: Cartridge / Converter type ( Cartridge & Converter unincluded) Condition: The pen is in very good, pre-owned condition and has been carefully cleaned. It writes very smoothly. The pen is in very good overall condition, presenting an elegant and well-cared-for aesthetic with only light micro-scratches from normal use and the passage of time, with no cracks, dents. A truly magnificent piece for daily use or collection. Please see the photos for full details. Pen only. No box or documents included. Will be securely packed and shipped with tracking. I will ship your order via express delivery as soon as payment is confirmed. Good luck! Happy bidding!