need help on year

Hi all, I need help with year of my dax st 70 frame number st 70 566194 engine number st 70E 144073.
Also who is the best company for parts?
Many Thanks Stephen Dublin

And yet an early one... 1969!

that's strange your numbering, do they go in sequence? i have st70-143*** does that mean mine is earlier?

been looking it up, i think i've found it.

And the answer is?????

not sure exactly, seems to be a '73 of some sort.