Amber bead with ogham inscription at the British Museum (1888,0719.119).  From Ennis, County Clare, Ireland, 5th - 7th century.  Inscription has been read as ATUCMLU ᚐᚈᚒᚉᚋᚂᚒ (only ..ML ᚋᚂ is visible on this image)
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<span class="int-own-work" lang="en">Own work</span>