What this coin looks like (obverse, reverse, mint mark location, special features, etc.): All 1922 Lincoln Wheat Cents (Pennies) were minted at the Denver Mint and should have received a "D" mintmark. An issue arised at the Denver Mint where the coin dies used to strike coins were being overworked and overused. Some coins would receive a weak "D" mint mark and in some very rare cases the mint mark would be completely missing. The rest of the coin features would have a weaker strike as well since the dies were so worn out. The "No D" variety is the rarest and most valuable. The penny is automatically classified as a "Weak D" variety if there are any traces of the "D" mint mark. Some coins will have a "Strong Reverse" or a "Strong Obverse" which means that the worn out dies were just replaced with new ones.
Coin value chart: Typical coin prices, values and worth in USD based on grade/condition