Top: Photographed at Portland Internation Airport, Oregon, USA, August 1970, by Ron Dupas
Third:
APS No. 1638B (No. 1638 was used
twice)
Fourth:
APS No. 1639
08/31/2007. Remarks by
Johan Visschedijk: "Flown in 1936 the sole four-seat amphibian F-4 (also known as F-401) was registered as NX16793.
APS No. 1638B
APS No. 1639
Subsequently it was sold to a mining company in Canada were it was registered as CF-BGZ.
NC16793 (
Phil Gies Collection)
In 1940 it returned to the USA, registered as NC16793 it is still on the register as of this day."