Rocket Pen 1961 Gagarin Boctok. The rarest space travel rocket pen out there. This vintage pen was once released to mark the victory of humans to visit space for the first time. Pen is in very good condition (new condition) which makes it even more special. Base appears to be painted metal. On the side of the rocket it says “BOCTOK” and the pen has double wings and gold colored bracket. Pen uses ink that is sucked up by means of a pump. When the back is turned, the piston rises and the pen fills.