Something off topic. Prior to the introduction of PASGT and ACH helmets in the Indian Army, this helmet model cropped up. It is seen in many photos of Indian troops in action and some claim that it is a Model 1974 and some say that is an Israeli Orlite. I don't agree with both ideas as the shape of the helmet and the liner is different in both cases. What model is it and when was it introduced in Indian Army service?