That is not a Sweet Sixteen serial number.
The Sweet sixteen name is the model of your Browning auto-5 shotgun!Is the number 51666 the serial number of your shotgun?Please re-post your question so that a answer can be provided.
Value depends on condition, age, accessories, box, papers.
That's not a Sweet Sixteen serial number. In fact, it doesn't even look like a Browning number to me.
What is the value of a sweet sixteen sn x98973? In excellent condition
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.
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you would need to include if the shotgun in question is a sweet-sixteen auto-5 shotgun,or a browning side by side,or a standard weight auto-5 shotgun and the condition of your shotgun to get a accurate value .
You will need a professional appraisal.
50-1000 USD or so
100-10000 USD or more depending on specifics
Around $700, depending on conditions and exact model.
Value from just the sn is a wild guess of 10-1000 USD
100-400 USD depending on condition.
Browning sweet 16 model s76727 value
You must give a much more detailed description of your Sweet-sixteen overall condition,to include the amount of original finish remaining on the wood and metal,and the bore,s condition.this will give me a chance to give you a acurate value of your highly desirable Browning sweet-sixteen shotgun.
Your Browning sweet sixteen was made in the year 1961 with the serial number that you have provided.The value could be between 350-1.200 dollars depending on overall condition of your shotgun.