As far as general circulation coins are concerned, easily the most valuable Australian Penny is the 1930 Penny and the most valuable Halfpenny would be the 1923 Halfpenny.
After the 1930 Penny, the Australian 1923 Halfpenny is the second rarest of Australian coins. An Australian 1923 Halfpenny, uncirculated and in absolute mint condition could fetch up to $60,000 AUD. If it has been rattling around in somebody's pocket but still in good condition, it might fetch up to $17,500 AUD. There were only 15,000 minted. A reputable coin dealer will be able to give a more accurate valuation.
They are neither rare nor valuable. Most coin dealers would be able to sell you a 1952 British Halfpenny.
Most coin dealers should be able to sell you a 1936 Australian Penny.
1937 penny
the most valuable is the penny in the us has a head on the front and back hope this helped :) :) :) :) :)
1930
The rarest and most valuable Lincoln cent that isn't an error is the 1909-S with VDB on it. The rarest and most valuable error Lincoln cent is the 1943 copper penny.
The Queen Victoria, penny-red, plate 77, one penny stamp.
The 1909-S V.D.B.
1970-S
dony
The most valuable ones are the 1943 copper penny, and the even more rare 1944 steel penny.