What This Coin Looks Like (Obverse, Reverse, Mint Mark Location, Special Features, etc.): There were several major varieties of the 1802 Draped Bust Silver Dollar. Two of them have the normal date with no major errors - but with different styling of the date. One has a Narrow Date (Close Date) in which the numbers were closer together and the "2" was further away from the liberty bust. The other variety is the Wide Date in which there was more spacing between the numbers and the "2" was noticeably closer to the liberty bust. The difference between the 1802 Narrow Date vs Wide Date is depicted above in the example comparison image.
There was also an 1802/1 draped bust dollar with a 2 Over 1 Overdate. This was the result of an 1802 being struck over an 1801 date on the die - which resulted parts of the underlying "1" being visible within and around the "2". There was two major varieties of this 1802/1 overdate. One variety is the Narrow Date (Close Date) and the other is the Wide Date. Like the normal date variety - the difference deals with the spacing between the numbers as depicted below in the 1802/1 Narrow Date vs Wide Date comparison image:
Lastly: There is an unbelievably rare 1802 proof restrike coin worth close to $1 million each - with only 4 coins known to exist!