1893-O VAM 6 is one of four documented Micro O family varieties with this year and mint. This is the most obtainable variety with this year, however by no means is it a readily available variety. I may seem 2 examples appear  for sale each year. Most examples seen are in Good/Very Good condition, or thereabouts, and examples in VF or higher grades are quite rare. The total population of this variety may not be more than 50 to 100 pieces.
 
This example is not perfect. It was cleaned and has a tiny indent behind the eye. Otherwise, even wear on both sides