I'd never heard of him until now, but he sounds like he was already part of the scene but did the one thing no one in the scene should do: tell others about his interest
Round Citizen one
I'd never until now seen a round calculator watch. I have mostly Casio's and a Sanyo. It's an astounding collection of 5 whole watches I have. Yep!
It's a difficult balancing act between doing YouTube and not selling out.
That's the one. I think it still has the distinction of being the only scientific calculator wristwatch. I like this King Arthur Round Table watch which is hundreds of thousands of dollars but that you can get a Chinese reproduction of for a few hundred dollars, but I wouldn't be confident enough to wear a fake openly.