classic motorcycle forum

Need help to identify the year of my 750 commando. It is definitely a 1970 frame (e.g side stand position, headlight/hallow, lugs for pump on back loop and indent in rear guard, handlebar controls, oil tank, chain guard to name a few features) but the number 141971 on the frame, gearbox and engine are apparently 1971 numbers. Only thing I can think of is that they continued making the 1970 model into 1971 for a while. Any one know about this?