Vietnam/Cold War Era ICS Navy Signal Flag "India" Marked "F"

Description

Here is a US/International Maritime Signal Flag. The flag is a yellow flag with a black circle in the center. The signal flag is "India" which by itself could mean "I am altering my course to port" in the International Code of Signals or to the US Navy "Coming alongside".
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