The rare skin from the Mirage Collection (2021) - AWP Desert Hydra - does have a unique float based appereance. The skin has a max float of 0.6 and as soon as you hit the 0.56-0.6 range, your white scope turns into a black scope. As of September 2023 there are only 187x Desert Hydra black scopes in existence.

However, if you look at the .56 desert hydra's you will still notice some white scratches on the scope. (All pictures are below)

For a Desert Hydra True Black scope you will need to get to float of .59. As of September 2023 there are only:
31 non souvenir + 14 souvenir = 45 true black scopes in existence.

If you think about crafting a .59 true black scope, you will not have any chance to do so. If you pick the highest and expensive .999 fillers for a trade up, the best you can achieve is a .587.

This means, there will forever be no more than 31 non souvenir true black scopes. While there is still the chance of getting a few .59 from souvenir packages, the drops will be extremly rare.

True Black Scopes will become one of the rarest and most valuable skins in CS and a must have for collectors.