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.
Miroku was making shotguns for different firearms Companies before Browning came along. Charles Daly was one of their biggest customers for shotguns. More info is needed to determine which gun you have. This is not a Browning serial number.