1) Ancient french coin 2) Early french coin 3) Medieval coin of France 4) Medieval french coin 5) Old French half-denier Found on https://www.crosswordclues.com/clue/obole
(from the article `coin`) ...defeated the Lombards in 774 and entered Rome, becoming king of Lombardy as well. His deniers were later made wider and still heavier (about 25 ... Found on http://www.britannica.com/eb/a-z/o/3
Ob'ole noun [ Confer F. obole . See Obolus .] (Old Pharm.) A weight of twelve grains; or, according to some, of ten grains, or half a scruple. [ Written also obol .] Found on http://www.encyclo.co.uk/webster/O/4