Reminds me of my first "10 speed" which was similar, but maybe a '69. It had the same "10 Speed" logo on the top tube, but the deraillers and shifters were Simplex, and the shifters were on the down tube. IIRC it also came with fenders, and the 27" tires were not blackwall or gumwall, but whitewall. The bike is long gone, but I still have this: