Does someone have an idea what these are?
Is one AGO C.I

General characteristics
Crew: two, pilot and observer
Length: 9.0 m (29 ft 6 in)
Wingspan: 15.0 m (49 ft 2 in)
Wing area: 41.5 m² (447 ft²)
Powerplant: 1 × Mercedes D.III, 117 kW (158 hp)
Performance
Maximum speed: 140 km/h (90 mph)
Range: 480 km (300 miles)
Service ceiling: 4,800 m (16,000 ft)
Armament
1 × 7.92 mm Parabellum machine gun