Awesome find, the old pillar style seem to far more rare to be found detecting than the later styles.
Right. The milled pillar style 1733-1773 or so seem to turn up far less than the bust style 1773-1821 or so. Probably on the order of 10-1 or even higher. Most of the early colonial hunters in the Maryland/Virginia area have far more cut Pistareens and even Cobs than your variety. They do seem to turn up more in New England than elsewhere