Common, scarce and rare U.S. Capped Bust Half Dollars (Halves) at Mintmark.com.
". . . The reverse was of the heraldic eagle style. This was continued through 1807. In that year John Reich's capped bust type, often referred to as the Turban Head, was initiated, a style which continued, with modifications, through 1839. From 1807 to 1836 specimens were made of large diameter. The denomination was lettered on the edge: FIFTY CENTS OR HALF A DOLLAR. In December 1836 a new design, smaller in diameter and with a reeded edge, appeared. The obverse featured Christian Gobrecht's adaptation of Reich's capped bust design. The reverse was also an adaptation of the earlier style, but with the denomination changed from 50C to 50 CENTS. In 1838 the reverse was again revised. Changes were made in the lettering, and the denomination was revised to HALF DOL. Coinage was continuous from 1807 to 1839 with the exception of 1816, the year of the disastrous Mint fire . . . Half dollars of the early years have formed the object of several important studies and references, including M. L. Beistle's Register of United States Half Dollar Varieties and Sub-Varieties and Al C. Overton's Early Half Dollar Varieties 1794-1836 . . ." — The History of United States Coinage: As Illustrated by the Garrett Collection, by Q. David Bowers