Pawl carrier arm main spring & Pawl return spring
BSA WM20, M20, M20WD and M21 (1937 to 1947)
BSA M20, M21, B31 and B33 (1948 and up)
Partnumbers: 15-4161 & 15-4139
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Pawl carrier arm main spring & Pawl return spring
BSA WM20, M20, M20WD and M21 (1937 to 1947)
BSA M20, M21, B31 and B33 (1948 and up)
Partnumbers: 15-4161 & 15-4139
| SKU | 15-4161/139 |
|---|