Welcome to the forum. You have a 1972 Lincoln cent minted in Denver, one of over 2.6 billion minted there that year. The composition is brass, the diameter is 19 mm/ 3/4 in, and the average weight is 3.11 grams. The obverse die that struck this particular coin looks to have been heavily resurfaced, possibly to remove damage, which has removed enough of the surface to erase some of the lowest relief of the design, such as the front and back of Lincoln’s neck, the lapel, and tie. It has also affected the lettering near the rim and other parts of the bust and head. It is interesting looking, but not really worth more than a few cents, unless you can find someone who collects coins struck by overpolished dies.