Hi Brenda!! Yup you are in the wrong place, but let's see what we can do anyway. Sounds like you have a common Japanese Nambu. It's a bit larger and a lot more ugly than a Luger. It is chambered for an 8mm round, rather than the 9mm Luger cartridge. The 22761 is the serial number and the 19.3 is the date of manufacture (March 1944). The 3 is the month and the 19 is the year of the emperor's reign which began in 1925. Hope this helps!