info from 1000aircraftphoto.com
Remarks by Jack McKillop: "These Model 48Cs were originally ordered by Sweden but the US government banned the shipment of these aircraft and they were earmarked for the UK. After the Japanese attack on Pearl Harbor, all 144 were impressed by the USAAF, assigned s/ns and designated P-66-VUs. This aircraft was assigned the s/n 42-6833. One hundred four of these aircraft were later furnished to the Chinese AF."
Aeroplane Photo Supply No. 150
Aeroplane Photo Supply No. 131