Pergamum, Mysia, pseudo-autonomous issue.

Obv: QEON CYNKLHTON, draped bust of Senate right 
Rev: QEAN PWMHN, bust of Roma right, no tresses, crescent before.

Lindgren III 277; SNGCop 446; BMC 213.

With permission of Roma Numismatics, Sep, 2010
Thanks to Kurt Ellenberger (Forvm Ancient Coins) for the attribution.