Browning did not record the serial numbers for the double automatic.I can say that they were made from 1952-1960.They also reintroduced it in 1971 for one year.
54564
Tripoli, Iowa, 50676: 42° 48' 28.97" north latitude 92° 15' 29.65" west longitude Tripoli, New York, 13158: 42° 44' 20.26" north latitude 75° 57' 44.73" west longitude Tripoli, Pennsylvania, 15927: 40° 32' 41.30" north latitude 78° 46' 37.08" west longitude Tripoli, Wisconsin, 54564: 45° 33' 18.91" north latitude 89° 59' 38.53" west longitude