I just went quickly through Pokhrishkin's "To know oneself in combat" online. He flew Yak-1s just after his missions where he flew Bf-109E. It was the baseline model of Yak-1 (1941), as there is reference that they got those from nearby regiment in 1942, and that nearby regiment was to get newly-produced ones. It also seems that his Yak had no radio. Only distinguishing marks between Yaks from his squadron and other nearby sqandron was propeller hub colour (doesn't mention which colour).
So... baseline, war-weary Yak-1 of default colour scheme of 1941 w/out antenna mast, unknown number, unknown prop hub colour.