Source: M. T. Ciceronis Epistolae Ad Atticum, Brutum & Q. Fratrem, published in 1555
This is an example of a wire watermark. The watermark consists solely of two small circles.
Additional Book Information
M.T. Ciceronis Epistolae Ad Atticum, Brutum & Q. Fratrem. Ex diuerforum exemplarium, praecipue: Victorii ac Manutii, collatione diligentissima castigatae. T. Pomponij Atticiuita. (Published at) Apvd Seb. Gryphivm Lvgdvni. 1555.
