Forerunner of the Type 14 Nambu that would be the standard Japanese sidearm of World War Two, the Grandpa Nambu was produced in relatively limited quantities well before the Papa Nambu was introduced. Blade front and tangent rear sights, with the "stacked cannonball" Tokyo mark on the chamber, 3-symbol nomenclature on the right side, serrated bolt sides, front strap grip safety, checkered hardwood grips (left panel number 162, right 400) and a nickel finished magazine marked "1923" with a wood base. The cocking piece is number "44". Some components are unnumbered, while others have mixed numbers. The serial number for this pistol is listed on page 44 of Derby's "Hand Cannons of Imperial Japan".

Exceptionally fine, with 90% plus arsenal blue finish, showing some wear on the high edges, scattered spotting and dings, and some light handling marks overall. The grips are very fine, with some light dings and scuffs. Mechanically fine. A solid representative example of a much sought after variation of a Japanese pistol.