Note Balls 4 with ADWC insignia, and 57-2541 with "Zero" prefix, and ADC insignia. Probably right around the time they dropped the Zero, and tweaked the markings.
Note Balls 4 with ADWC insignia, and 57-2541 with "Zero" prefix, and ADC insignia. Probably right around the time they dropped the Zero, and tweaked the markings.