This is the multi-colored version of the “Friday” patch for the VFA-34 Blue Blasters worn only by the aircrew. It shows their ‘mascot’ (a joker) wielding an instrument of destruction. According to ‘The Hook’ (Tailhook’s magazine), the VFA-34 “Friday” patch with the joker on the cards is VF-20s WW II first cruise (1944) insignia.
