FLOWN Fisher Ink Pen. Approx. 5 in. long metal ink pen, silver in color with velcro attached and stamped with part number SEB12100051-201 and serial number P7. The pen was used by James Irwin during the entire flight including while in the LM on the lunar surface. It would usually be stowed in a pocket on the upper-left sleeve of his inflight garment and used for notation of flight plan updates, recording data and instrument values, or making general notes. Fisher pens utilized a pressurized cartridge which allowed ink to flow in the absence of gravity. [With:] Typed letter signed from Mrs. James Irwin. (2)