Competing against the F-16, Mirage F-1, and others, Grumman was successful in selling their F-29 to a number of countries looking for a lightweight fighter with good performance. A fighter version of their X-29 Forward Swept Wing research aircraft, it proved quite popular with users looking to replace their F-5's and F-104's. One such user was the Dutch Air Force (KLU).
The kit is the 1/72 Hasegawa X-29. It was built basically "out of the box" with pylons and weapons added. The decals came from an old F-16 kit.
The first picture is the F-29 next to the X-29.
Ed