What grey-market means
Brand watches arrive in the world via authorised dealer (AD) allocations. ADs sometimes have excess stock, parallel-import dealers buy from low-margin markets and resell into high-margin ones, and individual collectors offload watches they bought at retail. All of this is legal trading of genuine watches, just outside the brand-controlled retail network. Brands hate it because they lose pricing control; collectors love it because hot references are available without waitlists, and cold references sell at discounts.
The warranty trade-off
Most Swiss brands void manufacturer warranty on watches sold by unauthorised channels. Some grey-market dealers offer their own dealer warranty (12-24 months) which usually covers movement issues but not crystal/case damage. Brand-tier service is still available but you'll pay full price even within the original warranty period. For an unbroken-warranty watch, buy from an AD; for grey-market, factor in the warranty risk.
When grey market is smart
Hot references at premium: the only realistic path to a current Royal Oak / Nautilus / Daytona without a 2-4 year AD relationship. Grey market for these is 1.3-2x retail. Cold references at discount: less-hyped models (Aqua Terra, Speedmaster Reduced, IWC Pilot, Tudor) often sell 10-25% below AD list, with full year-and-a-day inspection from grey dealers like Jomashop, Authentic Watches, Watch Standard.
When grey market is risky
Vintage and pre-owned: 'grey market' as a label loses meaning for old watches. Authentication and service history matter more than channel. Lower-tier brands: warranty matters more on watches that need service in 5 years rather than 10. Chronographs and complicated movements: service costs more, so warranty coverage is more valuable. Buy AD if these factor in.