Basically impossilbe to tell a model number by the sn.
You will have to contact Miroku to find out.
The letters NZ in the serial number indicate that your Miroku made Browning was made in the year 1991.
You will have to contact Miroku
No way to tell from just the serial number.
If it was made for Browning you can tell by the serial number.
Virtually impossible to identify the model of a weapon with just a serial number.
I believe it was known as the "Black Shadow".
2006 if it is using the Browning date system
Miroku guns made under their name does not have serial info published. Winchester, Charles Daly and Browning have all been made by Miroku in the past. Do you have a model?
No published sn data.
No published sn data.
To date your BC Miroku shotgun with the serial number 313957, you would typically reference the production records of Miroku, which can be found through firearm collectors' guides or Miroku's official communications. Miroku shotguns were primarily produced for the British market in the mid-20th century, so your shotgun is likely from that era. For a more precise date, consider reaching out to Miroku directly or consulting a firearms expert or appraiser who specializes in vintage shotguns.