Australian Postal Stationery Cut-Outs Date Question

Evening all. On going through another old collection I came across these two Australian postal stationery cut-outs.
The (very tatty) one on the left could be a newspaper wrapper as I have found a similar wrapper denominated 2d. Obviously late King George VI but unsure of date. The one on the right appears to have a postmark date of 1957 and looks like an envelope cut-out. Any information gratefully received.
Regards
DavidR

The ACSC Postal Stationery volume shows the 1½d as a 1951 issue, yours is cancelled 27MR52.

The second item is from a Melbourne Olympics aerogram.from 1956.

Thanks very much 64idgaf. Much appreciated.
Regards
DavidR

Thanks from me also 64idgaf

I didn't have a clue from just looking at the image.