This is a rare and popular platinum line P164. The standard 164 has gold-plated parts, but this one has silver-colored parts. No cracks, chips, or malfunctions, and no engraved name; the condition is good. A new compatible ink cartridge (black) is included. It's a twist mechanism. Many fake or broken P164s are circulating, but this one has been authenticated and its operation has been confirmed, so please rest assured. In the unlikely event that it is a fake, a full refund (including shipping) will be provided. Please note that this listing is for the pen body only. If you would like the box, please let me know, and I will include it for an additional 2000 yen.