A used BSA B31/B33 petrol tank for the rigid/plunger model. Cannot confirm the exact year of fitment. It does have some marks/scratches and some rust on the outside and on the inside.

There rust on the inside can be cleaned and lined.

We can supply our fuel tank pack for cleaning and sealing the inside too.

Petrol tank pack

This is possibly an aftermarket petrol tank as the marking points on the side for the knee grip screws to have inserts put in and round marks at the front where the badges would go. Also it appears the front mounting lugs seem to have been removed.