View of the final assembly hangar at Pilatus, when you were still allowed to take photographs during a tour. Visible behind Saudi PC-21 905 are, Indian Air Force PC-7 Mk.II P117 and P118. Further KSA aircraft visible are 902, 903 and, 904. The one in primer is customer number 161, to be Saudi 907. Please note that the so-called 'construction numbers' are in fact customer numbers. They are allocated as the contract is closed. Aircraft 161 has build number 171 for example. Maybe that can be considered the true construction number? It is on a plate bolted to the bulkhead of all PC-7/9/21s.