Xanten catapult pictures

[M. Caecilius]

Volume 18 of the Xantener Berichte deals with this engine. It might be worth a check, but browsing the book rapidly did not turn up a complete picture of the backside (several detailed pictures of the same). The photos are good, not terribly large if you want big details. Maybe it will be useful. The reference is H-J. Schalles (ed), Die frühkaiserzeitliche Manuballista aux Xanten-Wardt, Xantener Berichte 18; Philipp von Zabern: Mainz (2010).