Sounds like an Auto 5 Lightweight 20 ga made in 1968. 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. Auto 5's with recoil pads (other than Mag 12's) poly-chokes and compensators will reduce value. Recommend taking it to a gun shop for appraisal.
You will have to call Browning to find out.
Z=²8² = 8x8 = 64the value of z = 8
50-375 usd
13801-55 = 13746 and 13746/87 = 158
8
The prefix of 8Z indicates that you have a Browning light weight model auto-5 shotgun that was made in the first year of production,which was 1958.The value cannot be determined without you providing the overall condition of your shotgun,its bore condition,and what type of barrel is on the shotgun(Plain,solid matte rib,or vent rib type).
-8z + 5z = -3z
Z=z
As the World Turns - 1956 1-13746 was released on: USA: 12 April 2010 USA: 12 April 2010
8z-5 = 11 add 5 to both sides 8z = 16 divide both sides by 8 z = 2
By collecting like terms: 8z+4-2x
Even if done by Browning, it will diminish the value.