Tranquillina, AE23 of Nicaea, Bithynia. AD 241-244.

CAB TRANKYLLINA C, draped bust of Tranquillina right, wearing stephane.
NIKAIEWN, Dikaiosyne standing left, holding scales and cornucopiae.

Mabbott 1150 (this coin) = Vatican Duplicates sale, 590 (Schulman April 1972) = Roma Numis. int. no. 9909, May 2010.

With permission of Roma Numis. int. no. 9909, May 2010.
(When I identified this coin for Roma Numis. I did not realise that it was the Mabbott coin.)