Byzantine Empire, Justinian I AV Solidus, 527-565 AD, NGC Gem MS Fr. 720 It should be noted that

It should be noted that it exhibits no tobacco smell of any kind

1886 and 1912-S issues

B in right field

That isn't to say they are terribly hard to acquire - merely that they are about 6 times as scarce as the 1928 Series $20s

Year of Issue: 2014 Composition: Silver Weight in Grams: 31

Byzantine Empire, Justinian I AV Solidus, 527-565 AD, NGC Gem MS Fr. 720 It should be noted thatJustinian I (AD 527 565). AV solidus (4. 48 gm). Obv: DN IVSTINIANVS PP AVG, helmeted & cuirassed bust facing Rev: VICTORI A AVGGG and officina letter, Angel standing facing, holding cross surmounted by P and cross on globe; star in right field; mintmark CONOB A true Gem solidus.