[Buckeye30]

Lockheed actually had TWO different letters for their Naval aircraft from their 2 factories; "V" for Lockheed Vega Plant A (eg. PV-2 Harpoon) and "O" for Lockheed Plant B (eg. PBO Hudson).
"V" was also used by Vultee in 1941 until they became Convair (1942) then "Y" (eg. SNV Valiant).

Canadian-Vickers planes for Navy (1942-45) used "V" eg. PBV Catalina but they went to AAF as OA-10s.


Regards
Nick