Looks to be an early Commando motor - Commando head, early Concentrics, Distributor, Commando Primary.
Concentrics and distributor came on all the 750s from engine number 121007 (mid-year '67 production). Commando heads had the side oil feed due to the different head steady. Atlas, P11, N15, G15, 33 heads were all top oil feed.
My '67 G15CS head and cylinder
Toolbox and battery tray look original.