TL;DR: no impact.
Long form:
My job involved importing a small portion of our products - about 5 to 10% so speaking only about the stuff I'm familiar with...
The tariffs first floated involve non-component items - i.e. steel sheet, bar and plate and aluminum extrusions and ingot. Oversimplified but not too bad. Hence somebody making a sheet steel door frame in Tennessee is going to take it right in the teeth as steel sheet makes up a fair portion of their cost. Somebody extruding aluminum thresholds will be less impacted but mostly because we already had a punitive tariff on Chinese aluminum.
Also the previous aluminum tariffs did not apply to aluminum as a component. If you were importing aluminum door track with a wood door, brass latch and inlaid picture of Elvis the track didn't trigger the high tariff.
I don't know if the new ones will have any significant changes to implementation or component products but that ignorance is in exchange for my retirement and I'm happy with that bargain. From my new position it appears much ado about not so much - except for those poor guys with the sheet steel products. Typically the harmonized tariff system isn't considered recreational reading but here 'tis if anyone's interested:
https://www.usitc.gov/tata/hts/bychapter/index.htm
The product designation is in the form xxxx-xx-xx and usually isn't obvious. The tariffs listed to the right show exceptions. Do not panic when you see the numbers in column 2 - if memory serves they apply to North Korea and Cuba so are generally not in play anyway.
Watches will not be impacted by anything thus far announced. Even if they were specifically targeted I doubt much would happen to US prices unless the tariffs started topping 20%. Mostly because standard tariffs have less of an impact than the dollar's strength from day to day and are also insignificant compared to the importer's mark up. The typical 200.00 watch costs around 25 bucks fob so a 20% bump would result in a cost of 30.00 which amounts to piffle compared to the sell price anyway. It's usually cheaper to absorb than to reprint price books. (25.00 based on my memory of court records from the AP v SWI suit on the "Tri-Mix 'Royal Oak'" wherein SWI and Lior were heavily motivated to document as high a cost as possible as the award was based on profit).
My markups were no where near that number but watches have historically been a high profit item on a percentage basis - most especially from China. How else to explain the hundreds of Chinese catalog watches spawning new brands by the pantload on kickstarter each and every one of which offers luxury product at a low price? Anybody with an internet connection is suddenly a watch manufacturer - all it takes is a web site and an email account. Once upon a time it benefitted from a plane ticket but that's pretty much optional these days. Which is a pity because I liked having my travel paid for.