Authentication and appraisal - LA

[Carterman32]

I'm a first time Rolex buyer and want to get my watch appraised and authenticated. I live in the San Fernando Valley and have called a number of watch and jewelry stores. I can find jewelry stores that do appraisals and watch stores that do authentication, but none that do both. One of the jewelers said that he can check authenticity without opening the case, which makes no sense.

Does anyone know of a spot where I can kill two birds with one stone. I am trying to avoid trips to two different stores every time I buy a watch.