1967 160 Monza Junior Frame number location?

Could anyone tell me where the frame number is located on a 1967 160 Monza Junior ?

Usually on headstock or frame upright back of engine. If no frame number its American which then went by the engine number and a sticker on the front of the headstock. Is that my frame

What do you mean by ‘is that my frame’ ?

That was meant for my mate who asked me to answer your question. He has a 160 frame for me, sorry for confusion