Asta LIVE: https://www.biddr.com/auctions/aurora-heritage/browse?a=6096
Crispus as Caesar, 317-326. Follis, 3rd officina, struck under Constantine I the Great, circa AD 321/4. AE, 17.41 mm, 3.11 g. Siscia mint. Laureate head r. Rv. Legend in two lines within laurel wreath, in exergue mint mark, officina mark and palm branch r. RIC VII 175. Brown-green patina, VF.