There used to be three grades, I, II, and III and they were distinguished by the level of engraving on the receiver with I being plain and III being the most ornate. Now I notice they have a Grade VI and who knows what in between. Try Browning's website at: (http://www.browning.com/products/catalog/firearms/category.asp?value=022B) That should give you what you're looking for, but if not, try the Forum at Gunbroker.com: (http://www.gunsonthenet.com/). They have a number of experts who can answer just about any firearm question you have...and it's free. Good luck.
50-400 usd
100-1000 USD or so
Made in 1969. Model depends on the features.
There is no such thing as a Browning semiautomatic M70 rifle. The Model 70 bolt-action rifle was produced by Winchester, while Browning produced a very different semiautomatic rifle called the BAR. Which is it?
Comparison to known grades.
100-1500 usd
50-200 USD
The value of your Belgium Browning rifle depends on a number of things. First is what grade? What caliber followed by condition? Collectors typically pay more than retailers or dealers so keep that in mind. Best wishes.
You will have to call Browning.
10-400 usd
It was likely made sometime in the 1960s.
The suffix of M71 was assigned to the Browning model BAR(Browning semi-auto rifle) which was made in the year 1971 in Belgium for Browning.