Here’s an old drawing I did of an obscure inscribed celt, from a murky photo published long ago by Heinrich Berlin. The original reference is:
1955 News From the Maya World. Ethnos 20(4):201-209.
Berlin noted its provenience simply as from the “Michol River,” not too far from Palenque.
The most interesting aspects of the inscription are the odd chevron arrangement of the glyphs, as well as the final possessed noun, simply reading “his celt” (U-LEEM?). I will soon be posting some thoughts on the possible LEM or LEEM phonetic reading of the “celt” sign.