Hard to say
I think that 'watches' is the keyword most people use
smartwatches//com 55,000 USD 2018-03-07 Uniregistry
finewatches//com 40,450 USD 2009-02-20 Moniker
ladieswatches//com 25,753 USD 2006-11-07 SnapNames
watches//ca 20,000 USD 2015-10-25 eMall.ca/ NamingAdvisors
But you would be aiming for the high-end market.
Specialty stores, watchmakers, a Swiss company etc.
I'd contact a few watchmakers who hand-craft a couple of watches per year, or one of the euro companies.