This piece does not contain a date. Yet it was apparently reset in Structure 22 by Bird Jaguar IV (Proskouriakoff 1964: 182), and can be palaeographically dated to the late 5th or early 6th-century.
This lintel was probably all-glyphic, containing approximately 29 glyph-blocks, of which fragments of 5 are all that remains. It evidently opened with a long count, as suggested by those portions of the ISIG, glyphs G and F and the lunar series which survive.
TRANSCRIPTION, TRANSLITERATION AND TRANSLATION
(A1-B2): ISIG, undeciphered
(C1-D2):* TI-HUUN-na 3-?-? ? ?
A translation is inadvisable at this time.