The Contracts Ledger in
AIR 20/761  gives serial J1991 for a 'Bristol SS F3 experimental' against contract 35A/3312/C3844 & AS33826, as does
the Air Britain Register , presumably via the same source. It is possible that this refers to B3991 (the 3rd Scout F) renumbered
for submission to DofR Type 1, but subsequently cancelled. Even if the '3' of F.3 did not relate to it being the third Scout
F, possibly it was indicated as the F.3 rather than F.2 to avoid confusion with the F.2A Fighter. Interestingly, though a
later design than the Scout E, it appears to have been allocated the same c/n. The design was possibly developed against
Air Ministry Specification Type 1A and Directorate of Research Specification Type 1 .
Since 1910, C.H. Barnes (Putnam, 1964)