Watch List notes:

ROMAN AND BYZANTINE COINS

Constans, 337-350. Multiple of 1 1/2 Solidi (Gold, 25mm, 6.73g 6), struck as a donative on his coming to the throne at the death of his father, Aquileia, 337. FL IVL CONSTANS P F AVG Draped and cuirassed bust of Constans to right, wearing laurel and rosette diadem. Rev. VIRTVS CONSTANTIS AVG / *SMAQ Constans, in military dress, standing left, holding labarum inscribed with ΧΡ monogram in his right hand and reversed spear in his left; to right, at his feet, bound captive to right. Bastien Donativa 82a and note 3. Cohen 188. Gnechhi I pl. 13, 11. Mazzini 188 = ESR Collection 427. Paolucci/Zub p. 113, 365. RIC VIII, p. 315, 3. A. Zeno Collection 2282. Of the greatest rarity, with less than half a dozen known examples. Good extremely fine.

From a Swiss collection.