Black Spot on Red Ball?

[HomeBrewer]

I'm watching some of these YouTube videos of the 2021 Duke Challenge and the red ball appears to have a black spot on it, in addition to the white measle dots.

The white dots make perfect sense to me, but I cannot imagine what purpose the black spot serves. Am I missing something obvious?

 

[Bob Jewett]

I think it's an Aramith logo. Probably a reaction to the brand-free balls on the market.

 

[3kushn]

I always thought it was a mark designating the market where sold.
I've heard of dealers getting dinged for importing balls from Asia to sell here.
How did they know balls for Asia wound up in the US?

 

[HomeBrewer]

Good thoughts, thanks.