In the center of the engraving, inside a white pedestal surmounted by a seated figure: "Tablæ Sinvvm Tangentivm Secantivm ad Raduim I0000000 CVM Trigonometria [...] Lugd.Bat."; Below, the representation of a geometric form; Below: Brvxelas, Apud Lambertum Machant; Below: "sub signo peni pastoris 1683"