Watch List notes:

Michael II the Armorian and 'Stammerer' (820-829), AE 40-Nummi, two facing busts, rev. large M, XXX in left field, NNN in right field, omega below, cross above, 7.15g, 7h (DOC 10; Sear 1642; Sommer, MBR 30.3), traces of verdigris in recesses, otherwise a bold very fine.
Provenance
Gorny and Mosch, Auction 237, 7 March 2016, lot 2234
Estimate: £60 - £100