United Kingdom. A Rare Royal Naval Air Service (Rnas) Officer's Visor Cap, C.1915 Hold white and blue inks with

white and blue inks with the Civil Defense insignia on the front panel

with “FF” inscribed in the centre

showing age and minor wear

the book is missing its dust jacket and bending is evident to the card stock cover

the reverse with an Austrian Imperial eagle

United Kingdom. A Rare Royal Naval Air Service (Rnas) Officer's Visor Cap, C.1915 Hold white and blue inks withFabricated from a black wool on the exterior, featuring the classic high peak, the upper edge trimmed in black wool covered piping. It has a 38 mm wide band in black wool displaying a repeating thatched look pattern around its circumference. There is a 73 mm (w) x 63. 5 mm (h) Royal Naval Air Service officer's cap badge on the front, with a silvered eagle in the centre, surmounted by the George V crown in silvered and gold coloured bullion wire, in