Printer's insignia used by Zacharias Calliergi in black ink. From: Μέγα καὶ πάνυ ὠφέλιμον λεξικόν  (Magnum ac perutile dictionarium), Rome, Zacharias Callierges Cretensis, [1523]
Cropped from image published on karamitsos.com (accessed on Sept 28, 2023)