Watch List notes:

ABBASID: al-Mansur, 754-775, glass vessel stamp (5.69g), B--, Morton-, inscribed ...kahu li-'abd Allah / 'abd Allah amir al-mu'- / -minin 'ala yadday marwa(n) / bin bashir, translucent green, unpublished in the principal works, EF, RRR.

Estimate: 300- 400 USD