Watch List notes:

Nigrinian (died 284 AD). BI Antoninianus, Rome mint. D/ DIVO NIGRINIANO. Radiate bust right. R/ CONSECRATIO. Eagle standing facing, looking left; in exergue, KA (pellet in crescent) A. RIC 472; C. 2 (Fr. 50). BI. g. 3.85 mm. 22.00 RR. Very rare. Deep brown patina. F/About VF.