There is a two digit number in front of, or on top of the x. That's the last two digits of the year it was mfg.
That is not a Sweet Sixteen serial number.
That is not a Sweet Sixteen serial number.
I believe your serial number is wrong for a Sweet Sixteen.
Your Browning sweet sixteen was made in the year 1955 with the serial number that you have provided.
Please check your serial number again.Browning has never used a serial number starting with the letter A in the markings of the Sweet sixteen model of shotgun.There can be a number with no letter prefix,or a letter X,S,or a number followed by the letter S.
Serial number s76529.The serial number S76529 indicates that your Browning sweet sixteen shotgun was made in the year 1957.
As early as 1953-1976
Your Browning sweet sixteen shotgun was made in the year 1953 with the serial number that you provided.
Your serial number indicates that your Browning sweet sixteen auto-5 shotgun was one of the last 13 made in the year 1950.That years last sweet sixteen was serial number X43,700.
To answer your question I would need a serial number from your sweet sixteen.
The 0s prefix to the serial number indicates that your browning sweet sixteen was made in 1960.
The 4S prefix to your serial number dates your browning sweet sixteen to the year 1964.