Vietnam/Cold War Era Russian Signal Flag "A" Marked "A"

Description

Here is a Vietnam Era Russian Signal Flag. The flag is a red swallowtail flag with a white square in the center of the hoist. The flag means "Negative Answer" and has no ICS use.
I pin it around Vietnam/Late Cold War because the material it's made out of is indicative of materials that would've been used at the time.
Shipped with USPS First Class