I am pretty certain all A-5's were made in Belgium.Your 75Z prefix to the serial number indicates that your Browning auto-5 shotgun was chambered as a 20ga auto-5 made in the year 1975.All Browning auto-5 shotguns were produced by Miroku of Japan starting in the year 1976.So I can say that your Browning auto-5 shotgun was one of the last made shotguns by FN of Herstall,Belguim for Browning.
50-5000 USD depending on specifics
Browning offers history letters for @ 40 USD
The 7X prefix indicates that you have a Browning auto-5 shotgun in the magnum 20ga model that was produced by FN of belguim for Browning in 1967.
The browning B-2000 shotgun was made by FN of belguim,and assembled in Portugal.these shotguns were made from the years 1974-1983.these shotguns range in price from 275-400 dollars.
What is the question?
Browing catalog
Belgium and Japan
Yes
Check the frame
50-300 usd
You must contact Browning.
By the serial number