The movie Popeye is a flag rich film. The makers put a lot of effort to make unique flags. During the scene at the race track painted black flags on the background wall can be seen.
You can see several women holding flags with the various numbers of the horses on them. One flag is pink while another is sky blue.
The woman on the right is holding a red pennant for horse number 8 in her left hand. Although they are using binoculars the horses are actually very close and mechanically controlled.