Watch List notes:

Constans. AD 337-350. Æ Half Centenionalis (18.5mm, 2.05 g, 6h). Siscia mint(?), uncertain officina. Struck circa AD 348-350. Pearl-diademed, draped, and cuirassed bust right / Phoenix, radiate, standing right atop rocky mound; [...]. Cf. RIC 228 (for type); cf. LRBC 1123 (same). Green patina, a few light scratches. Good VF.

Ex Classical Numismatic Group Electronic Auction 238 (11 August 2010), lot 610.