Watch List notes:

The 'White Rose' Collection | Byzantine Empire, Constans (641-668), AV Solidus, 4.49g, Constantinople, crowned facing bust wearing chlamys and holding cross on globe, rev. victoria avgus, cross potent on three steps, conob+ in below (Sear 941; DOC 4), lustrous, extremely fine.
Provenance,
The "White Rose" Collection of Ancient Coins, formed over several generations between 1914 and 1975,
Spink 240, 26-27 September 2016, lot 2708
Estimate: £600 - £700