Tough to say. All the military SVs were shipped in 1945, no particular rhyme or reason to the order in which they shipped. None were sent to the British. There were quite a few SV frames left over after VJ Day, and those were made up in civilian style (blued with checkered wood grips and lanyard loop holes plugged). Those were all shipped for civilian sale during the first four months of 1946. The SV series ceases at about SV 813xxx. Was then changed to the S series in continued numerical sequence. If yours is blued, not phosphated, it is probably one of the civilian SVs. From your pictures I'd say it is civilian. SVs are NOT Model 10s. Or even pre-Model 10s.