Watch List notes:

The Roman Empire

Trebonianus Gallus, 251 – 253. Binio, AV 5.83 g. IMP CAE C VIB TREB GALLVS AVG Radiate, draped and cuirassed bust r. Rev. CONCORDIA AVGG Concordia standing l., holding patera and double cornucopiae. C 28. RIC 6. Calicó 3331.
Very rare. Minor edge scuff at five o'clock on reverse, otherwise extremely fine

Ex Leu 65, 1996, 457 and NAC 24, 2002, European Nobleman, 186 sales.