if you read each term out:
z = "one zed" = 1z
1z = "one one, one zed" = 111z
111z = "three one, one zed" = 311z
so the next one is
311z - "one three, two one, one zed" = 13211z
The next character in the series, "1Z Y2 3X W4 5V" is "U6".
your browning shotgun was made in 1961 with the 1Z prefix to the serial number you provided.
12+1z
1Z is Italy I believe..
Your browning auto-5 shotgun was made by FN of belguim for browning in 1961.The 1Z prefix dates to that year.
40nm, 70nm, 113nm
factors of 2yz - 1y, 2z, 1z, 2y, 1, 2yz
1 = 1961, the year of manufacture Z is the letter code for the Auto-5 Light Twenty (as opposed to the Magnum Twenty) 55149 is the rest of the serial number sales@countrygunsmith.net
79-87 ft lbs
its 10x +9y +1z
The sequence appears to follow a pattern where letters and numbers are arranged in a specific manner. To determine the next answer, we might look for a pattern in the letters and numbers. However, without a clear rule or additional context on how the sequence is generated, it's challenging to provide a definitive next answer. If you can provide more context or a hint about the pattern, I would be happy to help further!
Browning.com has a sn function under customer service.