100-600 usd
Your browning 16ga auto-5 shotgun was made in 1934 with the serial number that you provided.However the browning sweet-sixteen auto-5 shotgun was not offered until 1937.These sweet-sixteen shotguns were made from 1937-1975.Does your browning shotgun say sweet-sixteen on the shotgun?If so please check your serial number again.
50-250 USD
It was made in 1975. Use the link below for value http://wiki.answers.com/Q/What_is_the_value_of_a_Browning_Sweet_Sixteen
If it truly has not been fired and is oiled and blued,probably around $500 to$600.
I can better help you,by having a discription of your shotgun.Is it a pump action,semi-auto,side by side,or over under shotgun.If you would include the serial number I could help pin down the model number Or at least pin down the year it was made.Also include the overall condition of your shotgun to best give you a accurate value of your shotgun.
Being that you said auto shotgun,then you have the Browning auto-5 shotgun that was made by FN in Belgium from 1903-1975.Your serial number indicates that your Shotgun was made in the year 1938.
The prefix of 75x indicates that your Browning shotgun was made in the year 1975.
If it is in good condition this 1975 shotgun would probably sell for around $350 - $375.
Just the manufacturer.The browning auto-5 shotgun was made by FN of belguim for browning between 1903-1975.After 1975 the browning auto-5 shotgun was made by Miroku of japan for browning,both companys made the same shotgun with the same patent of john m browning.While most in this country feel that the quality of the belguim made guns are far bettter(and there is some truth to this) The japan made firearms are of excellent quality,fit and finish.I know because I have owned both.
Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Recommend taking it to a gun shop for appraisal.
The sn doesn't make sense according to Browning's table at http://www.browning.com/customerservice/dategun/detail.asp?id=13 My guess would be it was made in 75. Value range 200-500 the 75v means it is a 75 year model and the v means that it is a magnum 12 gauge . As for the value there is no way to value the gun without visually seeing the gun because of numerous factors like the grade of the gun, if the barrel and receiver are matching and condition of the gun but the 200-500 value range sounds like a good general price without any additional info.The 75V means that you have a Browning auto 5 Magnum chambered shotgun that was made in the year 1975.