/ Back Browning B2000 History The production of the B-2000 Automatic Shotgun began in late 1973. Production ceased in 1980. Date Historic Information Serial Number Info 1974-1975 1968 started using two digits for the date of manufacture which was followed by a one digit code that identified the type of B-2000. D=20 gauge C=12 gauge Example: 00001C47 = A 1974 B-2000 12 ga. shotgun with a serial number of 00001 D=20 gauge C=12 gauge 1976-1980 In 1976 Browning re-standardized its serial number identification. The B-2000 was discontinued in 1980. 1. B-2000 Type 611=12 ga. & Mag. 12 ga. 631=20ga. & Mag. 20 ga. 641=Trap 12 ga. 6B1=Skeet 12 ga. 6B2=Skeet 20 ga. 2. Date of Manufacture is a two digit code Z=1 Y=2 X=3 W=4 V=5 T=6 R=7 P=8 N=9 M=0 3. Serial Number beginning with 01001 at the start of each year. Serial Number Example: 641RT01001 This would be an B-2000 Trap 12 ga.,manufactured in 1976 with the serial number 01001.