Can Anyone Identify This Building?

Agree totally. As I said, pre-WW2!

Just studied that backstamp. It definetly starts with a K and not M. I believe it is Karrington. If it is, there is a good chance that was a place in good ole U.S.A.

OK, will look into it!

Could also be Barrington or Harrington. About the "..arrington" it seems clear.

Thanks for the suggestions.

I don't the mark is postal. The top arc is virtually non-existent by in the centre it says "BY" and "HARRINGTON"in the bottom arc.

This is what old Australian number plates look like



At left is a vertical VIC for Victoria, New South Wales had NSW, Queensland had QLD, South Australia had SA and Western Australia had WA. I don't know what Tasmania had, but it is a beach scene and while Tassie has some lovely beaches its just too cold there.

It is hard to tell if it three or two letters.