| The Bantam Engine & Frame Number Reference | |||||||||
| YEAR | D1 (Wico) | D1 (Lucas) | |||||||
| Engine | Frame | Frame | |||||||
| Rigid | Plunger | ||||||||
| 1949 | UYD-101 | ||||||||
| 1949 | YD1-101 | YD1-101 | |||||||
| (YD-101?) | |||||||||
| 1950 | UYD-20001 | UYDL-101 | |||||||
| 1950 | YD1-20001 | YDL1-101 | YD1-20001 | YD1S-20001 | |||||
| (YD20001?) | (YDL-101?) | ||||||||
| 1951 | YD1-40001 | YDL1-3001 | YD1-40001 | YD1S-40001 | |||||
| 1952 | YD1-63001 | YDL1-8001 | YD1-64001 | YD1S-64001 | |||||
| 1953 | BD2-101 | BD2L-101 | BD2-101 | BD2S-101 | |||||
| D1 | D1 | D3 | D3 | ||||||
| Direct & Comp | Battery | Direct & Comp | Battery | ||||||
| 1954 | BD-101 | BDB-101 | BD3-101 | BD3B-101 | BD2-14600 | BD2S-14600 | |||
| 1955 | DD-101 | DDB-101 | BD3-5138 | BD3B-5138 | BD2-34701 | BD2S-34701 | |||
| Frame D1 | Frame D3 | ||||||||
| Plunger | Plunger | ||||||||
| 1956 | DD-4801 | DDB-3301 | BD3-10401 | BD3B-12801 | BD2S-55001 | CD3-101 | |||
| 1957 | DD- | DDB- | BD3- | BD3B- | BD2S- | CD3- | |||
| D1 | D1 | D5 | D5 | Frame D1 | Frame D5 | ||||
| Direct | Battery | Direct | Battery | ||||||
| 1958 | DD-8577 | DDB-7849 | ED5-101 | ED5B-101 | BD2S-65001 | FD5-101 | |||
| D1 | D1 | D7 | D7 | Frame D1 | Frame D7 | ||||
| Direct | Battery | Direct | Battery | ||||||
| 1959 | DD-10812 | DDB-10628 | ED7-101 | ED7B-101 | BD2S-67581 | D7-101 | |||
| 1960 | DD-12501 | DDB-12501 | ED7-1501 | ED7B-7001 | BD2S-70501 | D7-8101 | |||
| 1961 | DD-14501 | DDB-14501 | ED7-3001 | ED7B-15501 | BD2S-73701 | D7-18401 | |||
| 1962 | DD-15481 | DDB-16413 | ED7-4501 | ED7B-23001 | BD2S-76680 | D7-27450 | |||
| D1 | D1 | D7 | D7 | D7 | Frame D1 | Frame D7 | Frame D7 | ||
| Direct | Battery | Direct & Trail | Battery | Police | (All) | Trail | |||
| 1963 | DD-16129 | DDB-17606 | ED7-5505 | ED7B-26904 | ED7BP-26904 | BD2S-78746 | D7-33268 | D7-33268T | |
| D7A | D7A | Frame D7A | |||||||
| Direct | Battery | ||||||||
| (USA) | (USA) | ||||||||
| ED7A-5505 | ED7BA-26904 | D7-33268 | |||||||
| 1964 | ED7A-6887 | FD7A-101 | D7-38400 | ||||||
| D7 | D7 | Frame D7 | Frame D7 | ||||||
| Direct & Trail | Battery | Trail | |||||||
| ED7-6887 | FD7-101 | D7-38400 | D7-38400 | ||||||
| D7 | D7 | D7 | Frame D7 | ||||||
| Direct | Battery | Pastoral | (All) | ||||||
| & Trail Bronc | |||||||||
| 1965 | ED7-9001 | FD7-3001 | ED7-9001 | D7-42878 | |||||
| D7 Deluxe | D7 Silver | D7 Silver | |||||||
| & Deluxe | |||||||||
| 1966 | ED7-101 | ED7-101 | FD7-101? | D7-49985 to 51960 | |||||
| 1966 | GD7-101 | GD7-101 after frame 51960 | |||||||
| D10 | D10S | D10B | Frame D10 | Frame D10 | Frame D10 | ||||
| (4 speed) | (Bushman) | (4 speed) | (Bushman) | ||||||
| 1967 | D10-101 | D10A-101 | D10A-101 | D10-101 | D10A-101 | BD 10A-101 | |||
| D13 Supreme | D14/4 Supreme | D13 Sports | Frame D13 | Frame D14/4 | Frame D13 | ||||
| Supreme | Supreme | Sports | |||||||
| 1968 | D13B-101 to 780 | D14B-781 | D13B-101 to 780 | D13B-101 | D14B-781 | D13B-101S | |||
| D14/4 Sports | D13 Bushman | D14/4 Bushman | Frame D14/4 | Frame D13 | Frame D14/4 | ||||
| Sports | Bushman | Bushman | |||||||
| 1968 | D14B-781 | D13C-101 to 780 | D14C-781 | D14B-781S | D13C-101B | D14C-781B | |||
| From 1968 onwards all BSA models used the following numbering system: | |||||||||
| First two letters represented the date (see below) | |||||||||
| Model numbers for 1969-70 were D175, D175B | |||||||||
| Model numbers for 1971 were D175 | |||||||||
| Serial number, starting at 00100 each model season. Model seasons start August and end in July. | |||||||||
| Month code: | |||||||||
| A | January | H | July | ||||||
| B | February | J | August | ||||||
| C | March | K | September | ||||||
| D | April | N | October | ||||||
| E | May | P | November | ||||||
| G | June | X | December | ||||||
| Year code: | |||||||||
| C | August 1968 to July 1969 | ||||||||
| D | August 1969 to July 1970 | ||||||||
| E | August 1970 to July 1971 | ||||||||
| G | August 1971 to July 1972 | ||||||||
| Important Notes: | |||||||||
| The above chart has been gleaned from a large number of reference sources which seem to disagree on many of the | |||||||||
| models. Any information which will help refine this chart is gratefully accepted. | |||||||||
| Where a question mark (?) is shown I am unsure, due to numerous conflicting data sheets, of the actual numbers. In these cases | |||||||||
| I have tried to include all. | |||||||||
| Despite proof reading this many times, I am sure there will be errors - email me if you find one and I will correct it! | |||||||||