KoponewtPelicram ❤️ Slug Goblin 3 points4 points5 points 3 hours ago (3 children)Do you know what's the serial number on that? Some manufacturers had special models mostly for export purposes with extra keys. For example Royal 11 is a 10 with extra keys, Underwood No. 46 is a 5/3/6 with extra keys. Remington No. 9 is an 8 with extra keys.