This is a vintage Onoto (De La Rue) fountain pen made of 9K solid gold. These 9K solid gold Onoto fountain pens have become rare even on eBay in recent years. I purchased this pen over a decade ago from David Nishimura's Vintage Pen shop. The nib is an original Onoto 14K 3/st. It's a plunger-filling system and functions correctly. Please see the images for the 9K hallmarks. The hallmarks are on the cap and the lever section of the barrel. The condition is excellent for a fountain pen that is over 100 years old, but not perfect. There is a small ding as shown in image 2. For comparison of length and thickness, please see the image with a Sailor Profit Standard fountain pen. Please refrain from price negotiations. Due to the nature of the item being gold, returns are not accepted.