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. Condition and age is also a factor. Auto 5's with recoil pads (other than Mag 12's) poly-chokes and compensators will reduce value. In used condition the range would be $200-$1500 depending
No
50-500 usd
OM was used for 1960 production of the standard Auto-5.
The Browning Auto-5 with serial number 103987 appears to be from the early production period, most likely before 1940. However, the serial number by itself isn’t enough to pin down the exact year because Browning’s records for early Auto-5s are incomplete. I’d recommend checking the complete markings on the receiver and barrel, including any letters, proof marks, gauge information, and whether it was made in Belgium or elsewhere. Those details can help narrow down the date much more accurately. Browning also notes that early Auto-5 production dates are sometimes estimates because very few records from that period remain.
your browning auto-5 was made in 1925.
Your browning auto-5 wa made by FN of belguim for browning in 1931.
Your browning model auto-5 12 ga was made in 1928.
your browning auto-5 was made in belguim by FN in 1914.
Your browning auto-5 shotgun was produced in 1931.
Your browning auto-5 magnum shotgun was made by FN of belguim for browning in 1965.
With the serial number that you provided,your browning auto-5 shotgun was made by FN of belguim for browning in 1907.
your browning auto-5 magnum was made in 1972.