Watch List notes:

Constans II, with Constantine IV, Heraclius, and Tiberius. 641-668. Æ Follis (20.5mm, 4.91 g, 6h). Constantinople mint, uncertain officina. Struck 666-668. Bust of Constans facing, wearing long beard and helmet, holding globus cruciger; K to right / Large M; busts of Heraclius, Constantine, and Tiberius to left, above, and to right, respectively, each crowned, wearing chlamys, and holding globus cruciger; [...] below. Cf. DOC 88-9 (for type); MIB 177-8; Cf. SB 1013-4 (same). Earthen brown patina. Good VF. Overstruck on an uncertain type.

From the Gasvoda Collection. Ex Roma E-Sale 71 (28 May 2020).