Browinging 12 gauge shotgun patent 67296 manufactured Fabrique Nationale Darmes De Guerre Herstal Belgique value and date?

Answer 1

I have a FN 12 gauge shot gun with acier special on the barrel.  The model number is 185962. The stock is made for someone that was right handed but left eye dominate.  In other words in curves to the left.  It does have a pad on it.  Any idea what it is worth?  Not really interested in selling it as it has been in the family for a long time, but I am considering changing the stock to a standard style.  

Thanks for your help and advise.  My e-mail is [e-mail]