Nevertheless, the Type 2 gold dollar (as it came to be known) proved unsatisfactory as the mints had difficulty in striking the new coin so that all details were brought out. This was due to the high relief of the design—the three Southern branch mints especially had trouble with the piece. Many of the Type 2 pieces quickly became illegible, and were sent back to Philadelphia for melting and recoinage. On most surviving specimens, the "85" in the date is not fully detailed. The Type 2 gold dollar was struck only at Philadelphia in 1854 and 1855, at the three Southern branch mints in the latter year, and at San Francisco in 1856, after the design was designated for replacement. To correct the problems, Longacre enlarged the head of Liberty, making it a scaled-down version of the three-dollar piece, and moved the lettering on the obverse closer to the rim. This improved the metal flow and design sharpness so much that early numismatic scholars assumed the reverse was also altered, though in fact no change was made and the Type 2 and Type 3 reverses are identical.