Boutiques are very helpful. Typically what happens, is they forward your timepiece to the Omega Service Centre servicing your region. For IL it will likely be SGUS New Jersey, but, it may also be the Omega Service Centre in Seattle. You will received a claim check (a work order) for your watch when you leave it. They pack, and ship your watch (as part of a large shipment), insured, to the service center. Generally watches go out twice a week. In Houston, they ship on Mondays and Thursdays. When service work is complete, the watch is returned to your boutique and you receive a call to come pick it up, paying any charges if necessary. You may also request that your watch be sent to you directly - you'll need to make that request at the time of drop off, specifying your address in writing on the work order at that time.