You have to bow to Jessie's horology knowledge, which with him being such a lover of all things horology is so, so extensive, personally think he's been sniffing to much glue.
Nubeo - American brand
Duchump - He's a great Swiss watchmaker of great note, with watches made in his little workshop in Switzerland and now made here in a small workshop in Surrey. Looks like and is built in the same way and same materials as a Rolex. In the same caliber as other brands who sponsor racing like Tag Heuer, Tudor.
Just for you Jessie.
Nubeo are a Chinese brand not American, the original Nubeo, that went out of business, was Swiss before the name was resurrected by Solar Time.
Duchump isn't a he it's an
it, and
it doesn't have any workshops as
it doesn't make watches. It's a little 2 person business in an office (like Swan & Edgar, Gamages, and a host of other micro/kickstarter type brands) that orders watches with Duchump branding on them from a 3rd party watchmaker, from the watchmakers existing designs. While some of the watches may be assembled in Switzerland, some are not, and while some may have Swiss movements most of the watch parts themselves are of Far East origins (Cases, dials, hands, packaging etc).
Duchamp watches are not made of the same materials as Rolex, Rolex use 904L stainless steel, which has a higher corrosion resistence than the standard 316L stainless used in the Duchump, and are in no way in the same caliber as Rolex, Tag or Tudor, who are all ACTUAL watchmakers, and some of the few that ACTUALLY make all or most of the watches in-house themselves, Rolex is 100% in house made, from the cases right through to the movement, Tag and Tudor make their own watches but have 3rd part movements (ETA, Sellita, Valjoux) in some of their watches, but also have their own in-house movements as well now.