If it's not a Wheat penny, it's not a US coin. A lot more information is needed, post new question.
Common Lincoln Wheat Cents from the 1940's & 1950's are only 3 to 10 cents.
1940S Wheat Penny: very good condition-$ .05, mint condition-$1.50, uncirculated-$5.00 .15-6.00
There has never been an A mint mark on US coins. Please check again, or see the related question for information about 1940 cents.
They're wheat ears, not wheat straws. Cents from the 1940s are not rare. A 1940-D will sell for a nickel or so if worn, up to a dollar if like new.
Wheat cents from the 1940's are all very, very common high mintage coins with average retail values of 5 to 10 cents.
Common Lincoln Wheat Cents from the 1940's & 1950's are only 3 to 10 cents.
1940S Wheat Penny: very good condition-$ .05, mint condition-$1.50, uncirculated-$5.00 .15-6.00
There has never been an A mint mark on US coins. Please check again, or see the related question for information about 1940 cents.
They're wheat ears, not wheat straws. Cents from the 1940s are not rare. A 1940-D will sell for a nickel or so if worn, up to a dollar if like new.
Wheat cents from the 1940's are all very, very common high mintage coins with average retail values of 5 to 10 cents.
There is no such mint mark. The only mints to strike cents with mint marks are Denver (D) and San Francisco (S). See this link for values.
Wheat ear reverse, not head. Common date circulated coins from the 1940s & 1950s are still only 3 to 5 cents.
It's worth one cent
About a dime in average condition. The Lincoln Memorial design was adopted in 1959 so your "wheat ear reverse" coin is perfectly normal.
That's King George VI, and the penny is worth around 25 cents.
Circulated rolls of 1940's sell for 75 cents to $1.00 so about 2 cents. It's a common date, worth between 5 cents and a couple of dollars depending on condition. It would not be worth anymore then $2 as there are Indian head pennies from the 1800's still floating around. The mint mark being gone also damages the value. A perfect 1940 wheat goes for about $5-6
1940 is not a rare date for Lincoln cents. In circulated condition, it's worth about 3 cents. A nice uncirculated one is worth about 50 cents.