A font by Christian Robertson (Betatype). Serif 6 Beta is part of a larger family of fonts called Serif Beta.
Serif 6 Beta has slightly heavier strokes than the rest of the family. Though it is heavier than most transitional fonts, and has relatively small closed counterforms on the a and e, its terminals, serifs, stress, and bowls feel more transitional than old style. Serif 6 Beta feels more “idealized” than “written.” It has a slightly larger x-height than Georgia.
Serif 6 beta comes in regular, italic, bold, and bold italic. It tests well across browsers, though there are some letterspacing issues in Safari on Windows XP. The whole family is available for free download at Betatype.