Source: Io. Francisci Buddei, Institutiones Theologiae Dogmanticae, published in 1724
This is an example of a wire watermark. It consists of a plant-like wreath with some sort of organic shape in the center. Being cutoff it is difficult to accurately identify what it is.
Additional Book Information
I.O. Francisci Buddei Theol. D. Et. P.P.O. Institutiones Theologiae Dogmaticae Variis Observationibus Illistratae. Cum S. Caesareae Maiestatis et regis pol. Atque Electoris Saxoniae Privilegiis. (Published at) Lipsiae: Ex Officina Thomae Fritschli. 1724