Picture no 1: The man standing beside the tank is Corporal Pauw
Picture no 2: Photo taken at the great parade on Andir AFB (Bandoeng) in 1939. In front tank D 9800 followed in 2nd row by an amphibious + D 9801 + the second amphibious. Some sources label the light tank as M/34 and the amphipious as M/31. The two light tanks D 9800-9801 had 2 x 7,7 mm HMGs (aircooled), the series M/36 tanks had only 1 x HMG (Watercooled)
Picture 3: Photo from Tandjoeng Priok (Batavia) 1938. The man in the turret is most probably 1Lt Wulfhorst.