Japanese Nambu Baby, 7mm, Tokyo arsenal logo on the chamber. This is known as a prototype, as it has many carryover features found on the Grandpa Nambu. These include the wooden base magazine, added lanyard loop, arched magazine release opposite, firing pin retainer with different checkering, a larger vent on the rear frame, and the cocking knob does not have the Papa style serrations. Other minor changes were made after about #447 as well. Few of this variant exist, as many were likely scraped due to not passing quality control and higher attrition due to their age. This one has Japanese inspector markings on the front and rear straps. This is well preserved with all matching numbers to include the magazine, and retains about 95% blue and a VG+ shiny bore.