For this TV-series a full-scale, non-flying replica of a WW2-era Caproni Ca 313 aircraft was built. It is now a part of the Swedish Air Force Museum in Linköping, Sweden. It incorporates a few parts from real Caproni-planes, found on a shooting range where all the surviving Swedish Capronis ended after the war.
Also, a radio-controlled model of the same plan was used in some scenes.