After the takeover of Dux-Presto, NAG offered their range of light lorries under its own name beginning in 1928. The shown vehicle is most probably a NAG 3 AZ for a payload of 2.5 ton in the design offered beginning in 1928.
The NAG 3 AZ with three axles was rare. The third axle was constructed as trailing axle and was not propelled.
This formerly civilian lorry is most probably an NAG lorry of the last NAG offer from 1930. The payload of the vehicle was around 1.5 - 2.5 tons.