Delivery of the first four D.XXI fighters for the Dutch army air force. They are not armed yet. A month latre during the Munich Crisis the service could only form three small fighter flights, one with D.XXIs, one with D.XVIIs and one with C.X reconaissance biplanes. Photo from: Bodo Sandberg collection
This photo was added on 11 February 2019, and has since been viewed 70 times.