Nakaya Dorsal Fin Version 2. Ishime-kanshitsu Heki Tamenuri Fountain Pen. Just received it today after waiting for about a year. If you know what this is, you know how rare and difficult to get. Extremely rare and perfect in every way. Please note: nakaya tests it’s pens. The pen came with ink cartridge installed for testing. This item is in the category “Collectibles\Pens & Writing Instruments\Pens\Fountain Pens\Other Fountain Pens”. The seller is “rowland888″ and is located in this country: US. This item can be shipped to United States.