[twocee]

Graham,

Thanks for that link to the ASV19A, which I note was also used by the Gannet. It is now clear that the TBM-3E (APS-4/ASH) was the US Navy model equivalent of the Avenger AS4, while the Avenger AS5 was a British "domestic" version, with no USN equivalent.

The TBM-3S2 and TBW-3W2 were ASW hunter/killer conversions of TBM-3E airframes in the early fifties.