The vast majority are quite common. Every so often one may still turn up in change.
The only rare US cent from the 1940s is the famed 1943 bronze cent. In 1943 the Mint made pennies out of steel to save copper for the war effort. However a small number were struck in error using bronze blanks left over from 1942. These coins sell for tens of thousands of dollars today.
A rare date for wheat pennies would be 1909 S VDB.
No, but in 1943 US pennies were made from steel coated zinc. These have become a collector favorite.
No, the 1951 Lincoln cent is not rare.
Not really.
They were minted at the Philidelphi(no mint-mark), Denver(D) mints. These pennies are not rare.
1943 silver pennies
A rare date for wheat pennies would be 1909 S VDB.
No, but in 1943 US pennies were made from steel coated zinc. These have become a collector favorite.
No, the 1951 Lincoln cent is not rare.
Not really.
They were minted at the Philidelphi(no mint-mark), Denver(D) mints. These pennies are not rare.
A rare date would be 1909-S VDB.
Uh, the word "everyday" means "ordinary or commonplace" so something that's commonplace can't be rare. If you're asking what are rare dates for Lincoln pennies please see the Related Question for more details.
NO, cleaning them will probably reduce their value
Please see Related Answers
Radio, Telegraph, TV (rare), Telephone, Radar, & crude computers.
No. 2.4 BILLION were minted, and there are no known major varieties.