Otho-Vespasian mule

This coin I failed to obtain, but I suspect it may be an authentic Ancient counterfeit combining a Second/Third period Otho obverse with a Vespasian reverse. Said to have been found in UK by a detectorist. Very interesting. UPDATE: another coin combining a similar type of obverse and Domitian as Caesar reverse was sold on ebay recently. It is definitely more suspicious and I regard it as a modern forgery. This coin may be of same stock as well.