In 1652, John Hull began striking silver coins bearing an image of a pine tree on the obverse and the date and denomination on the reverse. This design followed Hull's "Oak Tree" design.
Massachusetts "Pine Tree" Sixpence consist of the following die varieties: Noe 32 Noe 33 Noe 33a
Sources and/or recommended reading: Noe, S. P. (1943). The silver coinage of Massachusetts. New York, NY: American Numismatic Society.