Just got this Billon Antoninianus of Emperor Claudius II. It's still fresh in sandy patina and has Minerva on reverse. The obverse is head- Left and the coin was struck in Antioch. RIC V- 1, 225. Glad to read your comments.
Left heads are certainly more scarce than rights but there are still quite a few for Claudius. You might find the page linked below and a couple before it of interest. They describe variations and mint ID's. http://www.ric.mom.fr/en/search/adv...on=&Note=&Reference=&page=14&mod=result&hpp=5