What brand is this?

[Sfswimfan]

And shortly after the above, another one came up. I will need to dig on this but if anyone can spot it easily, please chime in. It's a beautiful suit. Maybe someone can recognize the black tag on the right hip.

From Guillo Cuellar's IG: https://www.instagram.com/p/BcvXOpPn...guillo_cuellar