Rare photo of K-4006 while operating with the Test Group. It only flew test missions between mid October and early November 1975. In 1993, the aircraft was delivered to Venezuela.

This F-16BM was in use as a testbed. The orange badge has a kangaroo and the texts "Orange Jumper" and "F-16 Flight Test". The orange tail band carries the text "AFB. Leeuwarden", revealing its homebase.

Armed F-16A of the Test Group.

During the nineties J-653 was the test F-16 of the RNlAF, hence the strange badge on the fin.

Throughout its career K-3001 was used by the Testgroep KLu for numerous tests, hence it was fitted with a special nose cone. It was not until the last years of the NF-5s career that it reverted to normal squadron service.