I tried to buy the white Sinn 104 and then noticed the post on P & C's home or checkout webpage that it wouldn't ship to the U.S. I'm waiting for mine thru U.S. Distributor Watchbuys and have been warned about the wait time. I would already have had it from P & C, if only...
https://www.pageandcooper.com/brands/sinn/
There has been much speculation that Sinn is having protectionist policies for its distributors worldwide because they give them mucho leeway on pricing. I strongly suspect that Watchbuys in the U.S. is the reason for this protectionism.
Now, one could always have it shipped to a trusted friend or family member within the EU (if you have one) and then have it shipped to the U.S., but, other than that, it's a shame that a unique piece for P & C cannot be purchased by us Yanks!