What this coin looks like (obverse, reverse, mint mark location, special features, etc.): One major variety of the 1806 Draped Bust Half Cent (Penny) features a large "6" in the 1806 date on the obverse of the coin. The reverse of the coin also features two stems at the bottom of the wreath.
The small "6" can be identified by noticing that there is a space between the liberty bust portrait and the number "6" - whereas the large "6" will actually touch and extend into the liberty head itself. The difference between the Large 6 vs Small 6 is depicted below in the example comparison image of the coins:
Some rare sub-varieties of the small "6" variety will feature stems on the wreath on the reverse of the coin. The stemless reverse also has larger numbers in the 1/200 fractional including a pointed "1" while the reverse with stems has smaller numbers and a blunt "1". The difference between the stemmed wreath vs stemless wreath is depicted below in the example comparison image:
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD