| Year |
Model |
Frame Prefix |
Engine Prefix |
Frame Serial Number |
| 1951 |
D
125
MK1 |
D |
D |
000001 - 003865 |
| 1952 |
D
125
MK1 |
D |
D |
003866 - 068451 |
| 1953 |
D
125 MK1 |
D |
D |
068452 - 069000 |
| 1953 |
D
125 MK2 |
D |
D |
069001
-
091506 |
| 1954 |
D
125 MK2 |
D |
D |
091507
-
122642 |
| 1954 |
D
150 MK2 |
D |
D |
005001 - 005611 |
| 1955 |
D
150 MK2 |
D |
D |
005612
-
038759 |
| 1955 |
D
125 MK3 |
D |
D |
122643
-
122922 |
| 1956 |
D
125 MK3 |
D |
D |
122993
-
123142 |
| 1956 |
D
150 MK3 |
D |
D |
038760
-
059593 |