Omega back in Costco US

I would assume that is the case for anything very complicated or exclusive.

IMO...not all grey dealers are created equal.

Is there a reason you think they would not repair it properly, knowing that it could lead to a return?

I would trust Costco to do the right thing. I inquired about returning a very expensive memory foam mattress that I bought there after I had owned it for more than a year. Costco told me to keep the mattress AND issued me a full refund, no questions asked. Now THAT is customer service. If they had an Omega that I wanted and their price was competitive, I would purchase it from them without hesitation. Their members are fiercely loyal for a reason.

That’s akin to the retail urban legend about a Nordstrom that accepted a return on a set of tires because the customer insisted- no joke.
I tested the Nordstrom return policy once- I had bought a pair of Kenneth Cole dress shoes when I was in a pinch once (on travel, no dress shoes- had an event I had to go to), wore them once then thew them in the closet. I used the box in my sock drawer to organize socks.
About 4 years later I was cleaning or my closet and found the shoes thrown in the back and thought to myself....hmmmm. Put them back in the box and brought them to the store. I was dead honest with the clerk- told I’m i bought them, hated them, wore them once 4 years ago and just didn’t want them....he scanned them in the computer and said the last retail value on them was $125...would I like cash or store credit.

Companies like Costco or Nordstrom deserve the reputations they have for customer service. I give them high praise for that.