


The original funnel is red with a black top and a broad green intervening band. It bears a white saltire with splayed arms, overlaid by an undefined white circle containing a red N.
The alternative replaces green with blue. It apparently became general, being recorded for agency companies in the 1960s.
The later red, black-topped funnel has a broad blue band with a white couped saltire resembling propeller blades and a white disc with red N. The blue flag repeats the splayed, couped saltire and lettered disc. Rosanoski presumes this version belongs to the subsidiary.