Authorised Seller Accessories marked with 'Manufacturer Warranty' are covered by the official brand/manufacturer and you can therefore go to any authorised retailer for the repair or replacement. Handy, right? Note: Yes, every watch, bag and pair of sunglasses we sell are authentic.
However, be mindful that the warranty expires, most watch companies offer 2 year warranties, some 3 others 5 years. Provide the watch serial number to any authorized reseller and they should be able to help.