During a brief visit to the local museum at Tonina a few years ago, I noticed this interesting stucco glyph among the many displayed in the glass case. One can see it’s a conventional ‘K’atun’ with a 3 or 4 number coefficient, but the prefix is what caught my eye. The initial sign clearly represents a strand of hair passing through a carved tubular bead, just as depicted in a few portraits (see Tikal Stela 31). This presumably is an U- variant, slightly more elaborate that a common U form that shows only the skeletal bead. As John Justeson pointed out many years ago, the latter sign surely derives from the widespread Mayan words for “bead” (also “necklace”): *uuh (proto-Mayan), later appearing in Yukatekan and Ch’olan as u, uh or uj.