Royal Dutch Air Force Field officers peak cap.

Dutch service dress visor cap for a Field officer of the Dutch Royal Air Force. Excellent blue fabric peaked officers visor cap. Blue top and visor, black band with black patent leather chin strap. Gilt embroidered Royal Air Force badge showing the royal crown over a gilt flying eagle over gilt laurels. The batch is indicating a high rank officers cap.
Blue visor with gold band. This band indicates: a field officer.
Gilt Air Force button secured black patent leather chinstrap. 
Makers name inside: N. v. HEESWIJK & ZN, s' GRAVENHAGE. Size 56  
These peak caps were used by Dutch Air Force field officers only. These are ranks from Major to Colonel.

Genuine item and used around 1970. This cap is in a used  VGC.