Watch List notes:

Constantine I the Great AD 307-337, Trier Mint, ca. AD 322-323.
Laureate bust of Constantinus I right, wearing trabea and holding eagle-tipped sceptre, CONSTANTINVS AVG;
Altar inscribed VOTIS XX, with globe on top and three stars above, BEATA TRANQVILLITAS, in exergue _PTR_
RIC VII 369. Very fine. Size: D: 19.5mm; 2.55g