Manufacturing year unknown. Estimated to be from the 1950s to 60s. Manufacturer unknown. The main ink system is unknown, and domestic cartridges did not fit. The sub-system uses a rubber sac for ink filling. Main nib: Alloy HIGHEST JIS mark engraved Estimated to be EF (Extra Fine). Sub nib: Alloy SPECAL PEN engraved Estimated to be EF (Extra Fine). Total length (when writing): approx. 157cm Length when stored: approx. 135cm Cap diameter: approx. 120mm Barrel diameter: approx. 110mm Simple maintenance has been performed. Soaked in water overnight to remove some ink, but there are stains that could not be removed. Overall, there are small scratches, scuffs, dullness, and dirt. There are no dents or cracks. Body only. Shipping will be via Rakuraku Mercari Bin, using anonymous Nekopos. It will be wrapped in cushioning material and sent in an envelope. It will be delivered to your mailbox.