Watch List notes:

Constans II, with Constantine IV. 641-668. Æ Follis (28mm, 10.91 g, 8h). Constantinople mint, 4th officina. Uncertain RY, struck RY 15-17 (AD 655/6-657/8). Crowned facing figures of Constans, wearing military attire and holding long cross, and Constantine, wearing chlamys and holding globus cruciger; cross above / Large M, cross above; A/N/N/O - [X/...] (date) across field; Δ//CON. DOC 79-81; MIB 174b and 174d; SB 1010. Dark brown patina with some earthen blue highlights, edge split. Good VF. Overstruck on an uncertain earlier follis. A large and well struck specimen for the type.

From the Gasvoda Collection. Ex Savoca Online Auction 84 Silver (30 August 2020), lot 396.